Speaking to reporters during a visit to India, Rubio said the latest attacks underscored the urgency of finding a path toward ending the conflict, following a phone conversation with Russian Foreign Minister Sergei Lavrov.

“Every time you see these big strikes from one side or the other, it’s a reminder of why this is a terrible war,” Rubio said, adding that Washington remained willing to assist diplomatic efforts whenever an opportunity for progress emerged.

His remarks came after Russia launched a major attack on Kyiv and days after Moscow fired large numbers of drones and missiles at targets across Ukraine, attacks that Ukrainian authorities said killed at least four people over the weekend.

The renewed bombardment reflected a continuing escalation in hostilities as both sides intensify military operations more than four years after Russia’s full-scale invasion of Ukraine.

Russia said on Monday it was prepared to carry out additional strikes against Kyiv, including what it described as the Ukrainian government’s “decision-making centers,” signaling that further attacks on the capital could follow.

The phone call between Rubio and Lavrov highlighted the limited but ongoing diplomatic contacts between the two countries. According to Russia’s foreign ministry, Lavrov urged the United States to remove diplomatic personnel from its embassy in Kyiv amid security concerns.

Rubio said Moscow had not singled out the United States and had instead issued a broader warning to foreign diplomatic missions operating in the Ukrainian capital.

“It was a notice sent to all the embassies,” Rubio told reporters.

The comments suggest Washington continues to balance support for Ukraine with efforts to preserve diplomatic communication with Moscow, even as prospects for a negotiated settlement remain uncertain and battlefield conditions continue to deteriorate.

The latest exchange between the two senior diplomats comes as the United States seeks to maintain engagement with both Kyiv and Moscow while monitoring the security risks posed by intensified Russian missile and drone attacks on Ukraine’s major cities.

Ukraine’s State Emergency Service said rescuers were still clearing debris and searching for survivors in Kyiv’s Darnytskyi district after hours-long attacks overnight caused extensive destruction to apartment buildings and civilian infrastructure.

“Rescuers continue clearing the rubble and searching for people in the building in Darnytskyi district non-stop,” the emergency service said in a statement posted on Telegram, revising an earlier reported death toll of 16.

Images released by Ukrainian authorities showed burned vehicles, shattered residential buildings and emergency personnel working through debris in heavily damaged neighborhoods.

The latest strikes marked one of the deadliest attacks on the Ukrainian capital in recent months as Russia continues intensified aerial bombardments targeting cities and infrastructure across Ukraine amid the prolonged conflict.

Ukrainian officials have repeatedly accused Moscow of deliberately targeting civilian areas during large-scale missile and drone assaults, while Russia maintains that its strikes are directed at military and strategic infrastructure.

The attacks came as fighting along multiple front lines in eastern and southern Ukraine remained intense, with both sides continuing long-range strikes deep beyond battlefield positions.