Semeru, the tallest mountain on Java island, threw up towers of ash and hot clouds on Saturday that blanketed nearby villages in East Java province and sent people fleeing in panic.

The eruption severed a strategic bridge connecting two areas in the nearby district of Lumajang with the city of Malang and decimated buildings, authorities said.

BNPB official Abdul Muhari told Reuters that 10 people trapped around mines near the volcano had been evacuated, without elaborating.

Thoriqul Haq, A local official in Lumajang, said earlier that sand miners had been trapped around their work sites.

East Java Deputy Governor Emil Dardak told news channel Metro TV that one more death has been reported, bringing the total to two.

BNPB said at least 35 people had been hospitalised, while Lumajang’s deputy head said 41 people suffered burns.

Semeru, more than 3,600m high, is one of Indonesia’s nearly 130 active volcanoes. It erupted in January, causing no casualties.

Indonesia straddles the “Pacific Ring of Fire”, a highly seismically active zone, where different plates on the earth’s crust meet and create a large number of earthquakes and volcanoes.

Separately, an earthquake of Magnitude 6 struck north of Halmahera on Sunday, the European-Mediterranean Seismological Centre (EMSC) said. Halmahera is about 2,000km northeast of Semeru.