The tallest mountain on the island of Java erupted dramatically on Saturday, shooting a towering column of ash into the sky that blanketed surrounding villages. Fourteen people were killed and dozens more injured.
Aerial footage showed roofs jutting out of an ashen landscape, while on the ground military officers, police and residents dug through mud with their hands to extricate victims.
On Monday, the head of the Semeru Volcano Observatory, Liswanto, warned people to keep a safe distance from the mountain, amid reports anxious residents had returned to their homes to check on belongings and livestock.
"The status of Mt Semeru is still at level 2, which means at this level, people need to be more vigilant because the potential threat is still there," he said.
More than 50 people had suffered injuries from the eruption, mostly burns. Lava flows destroyed a strategic bridge connecting two areas in the nearby district of Lumajang with the city of Malang.
In the Sumberwuluh area, where two trucks lay half-buried by volcanic ash, recovery efforts came to an abrupt halt because of strong winds, a Reuters witness said.
Public kitchens and health facilities have been set up for more than 1,000 people who have been displaced.
A trauma healing team to work with children affected by the eruption has been dispatched, CNN Indonesia reported, while hundreds of aid packages, including rice, blankets and clothes and other basic necessities have been sent to the area.
Semeru is one of more than 100 active volcanoes in Indonesia, a country that straddles the Pacific Ring of Fire, an area of high seismic activity that rests atop multiple tectonic plates.