Officials in Kyiv said emergency crews were responding after a residential building near the city centre sustained significant damage. Kyiv Mayor Vitali Klitschko said people were trapped on the seventh through ninth floors of a building in the historic Podil district, while debris from intercepted drones also struck another residential building and several other parts of the Ukrainian capital.

Reuters witnesses reported multiple explosions across Kyiv as Ukrainian air defence systems engaged incoming Russian drones and missiles. Authorities continued assessing the full extent of the damage, with rescue operations underway.

The latest strike followed one of Russia’s heaviest attacks on Kyiv only days earlier, when hundreds of drones and dozens of missiles were launched against the capital, killing at least 30 people, according to Ukrainian officials.

In Crimea, authorities installed by Moscow said Sevastopol temporarily lost electricity after what they described as a Ukrainian attack on energy infrastructure near the city. Governor Mikhail Razvozhayev, appointed by Russia following its annexation of Crimea in 2014, said power supplies were disrupted after the attack but provided no immediate details on the scale of the damage.

The exchange of attacks came as Zelensky said Ukrainian intelligence had received information indicating that Russia was preparing another major strike. In his nightly address on Sunday, the Ukrainian president said Moscow appeared to be planning a fresh wave of attacks ahead of the NATO summit in Turkiye, where he is expected to hold talks with U.S. President Donald Trump on the war.

Zelensky also disputed Russian claims that its forces had captured Kostyantynivka, a strategically important town in Ukraine’s eastern Donetsk region. He said fighting was continuing there despite Moscow’s announcement that the settlement had fallen under Russian control.

Kostyantynivka, which had a pre-war population of about 78,000, has long been regarded as a key objective in Russia’s campaign to secure the Donetsk region because of its position as a gateway to other Ukrainian-held urban centres.

Russia’s Defence Ministry said on Sunday that Ukraine had declined a proposal for a six-hour ceasefire around Kostyantynivka that Moscow said would have allowed the transfer of the bodies of fallen Ukrainian soldiers. The ministry said Kyiv had been given until 0900 GMT on Sunday to respond. Ukrainian authorities did not immediately comment on the Russian statement.

Zelensky said Ukrainian long-range strikes targeting oil and fuel facilities inside Russia were producing tangible results and argued that sustained military pressure on Moscow remained necessary to achieve peace.

Russia launched its full-scale invasion of Ukraine in February 2022 after years of tensions following its annexation of Crimea in 2014. The conflict has since become Europe’s largest war since World War Two, with repeated diplomatic efforts failing to produce a comprehensive settlement as military operations continue across multiple fronts.

The latest exchange of missile and drone attacks underscored the continuing intensity of the conflict, with both Russia and Ukraine maintaining long-range strikes against military and infrastructure targets while battles persist along the eastern front.

Sergei Aksyonov, the Moscow-appointed governor of Crimea, said the strike occurred in the northern part of the peninsula. He reported that one person was killed and two others were wounded, including one who was in serious condition, but did not provide further details about the nature of the attack.

The latest strike follows an increase in Ukrainian attacks targeting infrastructure in Crimea, reflecting Kyiv’s effort to disrupt Russian military logistics and isolate the strategically important Black Sea peninsula.

Russia seized Crimea in 2014 and subsequently annexed the territory, a move rejected by Ukraine and widely regarded as illegal by much of the international community. Western officials and analysts say Ukraine’s growing use of long-range strikes has increased pressure on Moscow even as Russian battlefield advances have slowed in recent months.

The attack came hours after Zelensky and Putin separately spoke by telephone with Trump about prospects for ending the conflict.

In a message posted on X late Saturday, Zelensky said he had called Trump to congratulate him on the 250th anniversary of U.S. independence. He said the two leaders discussed developments along the front line and agreed to continue their discussions in person during the upcoming NATO summit in Ankara.

Zelensky said there remained a genuine opportunity to end the war and described continued U.S. engagement as an important factor in achieving that objective.

The Kremlin separately described Putin’s conversation with Trump as constructive. Kremlin foreign policy adviser Yuri Ushakov said the call lasted nearly 90 minutes and marked the fourth conversation between the two leaders this year.

According to Ushakov, Putin congratulated Trump and the American people on the anniversary of U.S. independence. He said Trump reiterated his willingness to support a rapid end to hostilities and pursue a peaceful settlement, while U.S. envoys Steve Witkoff and Jared Kushner would continue mediation efforts and remained prepared to visit Moscow.

Ushakov said Putin again stressed that Russia favors a diplomatic resolution provided that what he described as Moscow’s fundamental positions are taken into account.

The Russian president also accused Ukraine and its European allies of seeking to prolong and intensify the conflict, according to Ushakov, arguing that European governments had misjudged the military situation.

Ushakov further said Putin told Trump that Russian forces continued to make gains along the front and cited the capture of the Ukrainian stronghold of Kostyantynivka as an important step toward securing the entire Donetsk region.

Ukraine denied Russia’s claim that Kostyantynivka had been captured.

The latest diplomatic contacts highlighted renewed international efforts to explore a negotiated settlement even as fighting continues across multiple fronts and both sides maintain sharply differing positions on the conditions for ending Europe’s largest armed conflict since World War II.

Authorities in Russia’s Krasnodar region said debris from intercepted Ukrainian drones ignited a fire at the Slavyansk-na-Kubani oil refinery, one of southern Russia’s largest refining facilities. Regional Governor Veniamin Kondratyev said one person was killed in Slavyansk and another was injured in a nearby village.

Ukrainian President Volodymyr Zelensky confirmed that Ukrainian forces had targeted the Slavyansk refinery and said a second refinery in Russia’s Yaroslavl region was also struck during the overnight operation.

“Tonight, our long-range sanctions reached two oil refineries in Russia,” Zelensky said on the Telegram messaging platform, adding that the attacks were intended to reduce resources supporting Russia’s military campaign.

The Associated Press could not independently verify videos circulating on Russian social media that appeared to show heavy smoke rising from the Slavyansk refinery.

The Slavyansk facility processes nearly 4 million metric tons of crude oil annually, according to its operator, and supplies petroleum products including fuel oil, naphtha and marine fuel for export through Russia’s Black Sea ports.

Russian authorities did not immediately confirm damage to the refinery in the Yaroslavl region. Governor Mikhail Evraev said temporary road closures were imposed following what he described as a Ukrainian drone attack, while Russia’s civil aviation agency briefly suspended operations at Yaroslavl Airport and several other airports in southern and western Russia.

In Russia’s Belgorod region, acting Governor Alexander Shuvayev said a separate Ukrainian drone strike killed one person and wounded another near the border with Ukraine.

Russia’s Defense Ministry said its air defenses intercepted 213 Ukrainian drones overnight over Russian territory, occupied Crimea, and the Black and Azov seas.

Ukraine’s air force, meanwhile, said Russia launched 142 long-range drones and eight missiles overnight. It said Ukrainian air defenses destroyed 125 drones and seven missiles before they reached their targets.

Ukraine has significantly expanded long-range strikes against Russian energy facilities and military-industrial infrastructure in recent months, saying the campaign is aimed at disrupting fuel supplies, reducing revenues that finance Moscow’s military operations, and increasing pressure on the Kremlin as the war enters its fifth year.

Moscow Mayor Sergei Sobyanin said on Monday that air defence systems destroyed almost 60 drones headed toward the Russian capital. Emergency services were dispatched to locations where debris fell, though officials provided no immediate details on casualties or damage.

The attacks prompted temporary flight suspensions at Moscow’s Sheremetyevo, Domodedovo, Vnukovo and Zhukovskiy airports before operations later resumed, according to Russia’s aviation authorities.

Russia’s Defence Ministry said a total of 301 drones were intercepted overnight, including over Russian-controlled territories in occupied areas of Ukraine. The latest wave of attacks followed renewed Ukrainian strikes last week on Moscow’s only oil refinery, one of the most significant assaults on the Russian capital since the full-scale war began in 2022.

In Ukraine, regional authorities reported civilian casualties in several areas following Russian attacks.

In the northeastern Sumy region, prosecutors said a drone strike killed three members of the same family — a 13-year-old boy, his 36-year-old father and his 73-year-old grandmother. The boy’s mother and two siblings were injured.

Further south, a drone attack on the southeastern city of Zaporizhzhia killed one woman and wounded three others, regional governor Ivan Fedorov said.

In the Odesa region, Governor Oleh Kiper said a Russian Iskander ballistic missile struck an agricultural facility on Sunday evening, killing one person and injuring three others. The attack sparked fires involving vehicles and fuel storage tanks.

Security concerns also intensified in Crimea, the Black Sea peninsula annexed by Russia in 2014. Sevastopol authorities cancelled all outdoor public events on Monday and ordered street lighting to remain switched off as a precautionary measure.

Governor Mikhail Razvozhayev urged residents to reduce electricity consumption amid growing pressure on regional energy supplies. Authorities have also restricted fuel sales to government agencies and essential services after repeated Ukrainian strikes on logistics routes and energy infrastructure contributed to shortages.

Ukraine’s navy said Russian drones also targeted commercial shipping in the Black Sea overnight, damaging three merchant vessels.

One of the vessels, the Panamanian-flagged dry cargo ship Victress, operated by Turkey-based Rana Denizcilik according to shipping data, sustained significant damage after being struck by a drone. Ukrainian Deputy Prime Minister Oleksiy Kuleba said a 58-year-old Egyptian crew member was killed and eight others, including Turkish and Indian nationals, evacuated the vessel aboard a lifeboat.

Kuleba said two additional merchant vessels sailing under the flags of Palau and Belize were also attacked but continued their voyages without reported casualties.

The incidents underscore the continued risks facing commercial shipping in the Black Sea, where attacks on ports, vessels and export routes have become a recurring feature of the conflict and have disrupted regional trade since the war began.

The latest exchanges highlight the growing use of long-range drones by both sides as the conflict increasingly extends beyond front-line battlefields and into major urban centers, critical infrastructure networks and international maritime corridors.

Sergei Aksyonov said on Telegram that the strike targeted non-residential facilities in the Crimean capital. He did not specify the type of attack or provide further details on the targeted sites.

The reported attack comes amid continuing hostilities between Russia and Ukraine, with both sides carrying out long-range strikes on military, energy and infrastructure targets.

There was no immediate comment from Ukrainian authorities regarding the incident.Crimea was annexed by Russia in 2014, a move rejected by Ukraine and most Western countries, and has remained a frequent target of attacks since the start of the broader conflict.

Regional governor Oleksandr Prokudin said the drone struck a civilian minibus in Kherson, part of a continuing pattern of attacks on populated areas since Russia launched its full-scale invasion of Ukraine more than four years ago.Hours later, another Russian attack targeted a second minibus in the city, wounding the driver, Prokudin said.

On Ukraine’s Black Sea coast, a separate Russian strike damaged port infrastructure in Odesa, though no casualties were reported.While civilian areas continued to come under fire, Russia’s Defense Ministry said its forces had taken control of the village of Myropillia in Ukraine’s northeastern Sumy region, near the Russian border.

The battlefield claim could not be independently verified, and Ukrainian authorities did not immediately comment.The roughly 1,250-kilometer front line remains largely static despite months of fighting, with U.S.-backed diplomatic efforts failing to secure a ceasefire.

Recent international focus on the Iran war has also shifted attention away from the conflict in Ukraine.In Russia, officials in the Krasnodar region said firefighters had extinguished a blaze at an oil terminal in the Black Sea port city of Tuapse that broke out Friday following a Ukrainian strike.

Ukraine has repeatedly targeted the Tuapse refinery and export terminal in recent weeks as part of a broader campaign aimed at disrupting Russian oil exports, a major source of wartime revenue for the Kremlin.

The economic effect of those strikes remains uncertain, however, as higher global oil prices linked to the Iran war and a partial easing of U.S. sanctions have helped offset some of the pressure on Moscow’s energy revenues.

Authorities in Russia’s Krasnodar region said no injuries were reported, but emergency crews were deployed to contain the blaze at the port, which has become a repeated target because of its major oil terminal and refinery infrastructure.

“In Tuapse, as a result of a drone attack by the Kyiv regime, a fire broke out on the territory of the seaport terminal,” the regional emergency headquarters said in a statement on Telegram.Officials said 128 firefighters and 41 emergency vehicles were sent to the site to tackle the fire.

The latest strike comes days after a major drone attack on Tuesday triggered a large blaze at the Tuapse refinery, forcing a production shutdown and causing oil leakage into nearby coastal waters. The refinery fire was extinguished on Thursday morning, according to local Governor Veniamin Kondratyev.

A state of emergency has remained in place in the area since Tuesday as authorities continue cleanup operations along the Black Sea coastline.Emergency workers said on Thursday they had identified five additional oil-contaminated sections of coast. In total, officials reported removing 12,600 cubic meters of polluted material from beaches and surrounding areas.

The environmental fallout has disrupted daily life in Tuapse, with local authorities advising residents not to drink tap water or use natural spring water as a precaution and urging people to limit time outdoors due to elevated benzene levels in the air.

Russia’s consumer safety watchdog Rospotrebnadzor recommended residents keep windows closed and avoid prolonged outdoor exposure. May holiday celebrations and large public events were canceled.The official reassurances triggered criticism online from residents who questioned statements that the situation remained safe.

“How about she comes to visit us and tries our fresh air?” one social media user wrote in response to comments by Rospotrebnadzor chief Anna Popova, who said the situation posed no health risks.

Tuapse, a major Black Sea export point for Russian oil products, has faced repeated attacks as Ukraine intensifies long-range drone operations targeting Russia’s energy infrastructure.Kyiv has increasingly focused strikes on refineries, ports and fuel depots deep inside Russian territory, seeking to disrupt one of Moscow’s main sources of war financing as global oil prices remain elevated during the Iran conflict.

Ukrainian drones also struck an oil refinery near the Russian city of Perm on Thursday, marking the second consecutive attack on oil facilities in the Ural region.Ukraine’s military separately said it had targeted a refinery in Russia’s southern Orenburg region, roughly 1,500 km from the Ukrainian border, underlining Kyiv’s growing capacity for long-range attacks.

Russia has not independently confirmed the extent of damage from those strikes.Ukraine says its campaign against Russian energy infrastructure is a response to sustained Russian attacks on Ukrainian power plants, fuel depots and heating systems, which have caused widespread blackouts and civilian hardship, particularly during winter.

Moscow and Kyiv have both escalated attacks on energy assets as the war enters another prolonged phase, turning fuel infrastructure into one of the central battlegrounds of the conflict.

Zelensky said Kyiv had deployed several hundred military specialists to the Middle East following the outbreak of conflict involving Iran, aiming to share its experience in countering drone threats and safeguarding maritime routes.

“Ukrainian military personnel are taking part in consultations on the further operation of the Strait of Hormuz. Safe navigation is a global value; we know this from our experience defending the Black Sea,” Zelensky said in his evening address.

Ukraine has relied on asymmetric tactics and technological innovations during its war with Russia, including the use of naval drones, to counter attempts to restrict access to the Black Sea, a critical corridor for its economy and military operations.

Zelensky said interest in Ukraine’s defense capabilities is expanding beyond Europe, with diplomats receiving requests from Asian countries seeking cooperation on maritime security and related technologies.He did not identify the countries involved but said officials had been instructed to engage on the requests promptly.

Ukraine’s participation in Hormuz-related discussions reflects growing international focus on securing key maritime chokepoints amid ongoing geopolitical tensions affecting global energy and trade flows.

State news agencies TASS and RIA, citing the ministry, said the aircraft lost communication before going down on the Black Sea peninsula, which Russia annexed from Ukraine in 2014.

The ministry said the dead included 23 passengers and six crew members, with no survivors reported.“The An-26 aircraft, with which communication was lost earlier, crashed into a cliff,” TASS quoted officials at the crash site as saying.

Authorities located the wreckage in Crimea, though further operational details were not immediately disclosed.Russia’s defense ministry did not provide additional comment outside regular business hours.

RIA news agency reported that, according to an initial assessment, technical problems were believed to have caused the crash.

No confirmation was given on whether an official investigation had been launched or if other factors were being examined.

The An-26 is a Soviet-era twin-engine turboprop widely used for military transport and logistics operations.

The captain of the Turkish-flagged Kafkametler had reported on Sunday morning that the ship was drifting toward a breakwater off Eregli, in northwest Turkey’s Zonguldak province, the provincial governor’s office said earlier.

Yerlikaya said the ship sunk after hitting the breakwater. The region was hit by powerful storms on Sunday and the governor’s office said the bad weather prevented air and sea vessels from carrying out searches.

“When the adverse weather conditions improve, search and rescue activities will start immediately,” Yerlikaya told reporters.