Indonesian authorities on Wednesday ordered hundreds of villagers to evacuate following multiple eruptions of a remote island volcano, raising fears it could collapse into the sea and trigger a tsunami.

Axar.az reports that Mount Ruang, a 725-meter (2,400-foot) volcano on Ruang Island, North Sulawesi, has erupted at least five times since Tuesday night, spewing fiery lava and ash plumes thousands of feet into the sky, the country’s volcanology agency said.

Agency chief Hendra Gunawan said officials had raised the volcano alert to the highest level, warning people not to go within 6 kilometers (3.7 miles) of the peak, due to fears Mount Ruang could partially collapse into the water and cause a tsunami, as it did in 1871.

“The force of Mount Ruang’s eruption is getting bigger and has emitted hot clouds of approximately 1.7 kilometers,” he told national news agency Antara, adding the eruptions were triggered by recent earthquakes in the area.