Mount Dukono, located on Halmahera island in eastern Indonesia, erupted on Friday morning, sending volcanic ash as high as 10 kilometers into the atmosphere, according to Indonesia’s volcanology authorities.

Local police said the victims included two Singaporean nationals and one Indonesian hiker who were inside a restricted exclusion zone near the crater when the eruption occurred. Indonesia’s search and rescue agency has continued to classify the three as missing while recovery efforts remain underway.Seventeen other climbers, including additional Singaporean nationals, were evacuated safely from the mountain on Friday.

The search operation was temporarily suspended late Friday because of continued eruptions and unstable conditions around the crater area. Authorities resumed the mission on Saturday with more than 100 personnel, including police officers, soldiers and drone operators.“We are racing in this search.

When the situation and condition is safe, we will approach the crater, and when an eruption occurs, we must secure all search personnel,” rescue official Iwan Ramdani said in a statement recorded near the Dukono monitoring station in Mamuya village.

Indonesia’s Centre for Volcanology and Geological Hazard Mitigation said the volcano erupted several more times on Saturday, including one blast that produced an ash column reaching around three kilometers above the summit.

National disaster mitigation agency spokesperson Abdul Muhari said preliminary information indicated the bodies of the two Singaporean hikers were located approximately 20 to 30 meters from the crater rim. The location of the Indonesian hiker remained unknown.

Singapore’s foreign ministry said it was coordinating with its embassy in Jakarta to assist affected citizens and their families, according to local media reports.Authorities said the hikers had entered an area subject to a four-kilometer exclusion zone imposed around the crater since December 2024.

The restriction remains in place because of persistent volcanic activity at Mount Dukono, one of Indonesia’s most active volcanoes.The volcano has remained at level two on Indonesia’s four-tier alert system since 2008. Officials said warning signs and public advisories had instructed visitors to avoid the restricted zone.

Indonesia sits along the Pacific “Ring of Fire,” a region of intense seismic and volcanic activity caused by shifting tectonic plates. The archipelago has nearly 130 active volcanoes and experiences frequent eruptions and earthquakes.

The Philippine Institute of Volcanology and Seismology said the incident occurred before nightfall on Saturday when accumulated lava on the volcano’s southwestern slope gave way, sending an avalanche of hot rocks, ash and gas downslope.

The agency’s director, Teresito Bacolcol, said the volcano has been exhibiting mild eruptive activity intermittently since January but emphasized that no explosive eruption had taken place.Authorities reported no casualties, though ash clouds spread across 87 villages in three towns, reducing visibility to near zero in some areas and disrupting road movement.

Caloy Baldo, mayor of Camalig, said residents were caught off guard by the density of the ashfall, which he described as severe enough to halt traffic along national roads.Local officials said agricultural losses were reported, particularly in vegetable farms, while livestock deaths included four water buffaloes and one cow.

Cleanup operations were underway in affected communities, including Camalig, which has a population of about 8,000 people.The volcano, rising 2,462 meters and known for its near-symmetrical cone, is among the Philippines’ most active and closely monitored.

Authorities had raised its alert status to Level 3 in January, indicating heightened unrest with potential for hazardous eruptions, including rockfalls and pyroclastic flows.Bacolcol said conditions had stabilized as of Monday but warned that the threat of further activity remained, noting that the volcano’s behavior continues to require close monitoring under the current alert level.