Indonesian authorities have issued a tsunami warning and raised the alert for Mount Ruang to the highest level after the volcano near Sulawesi Island had multiple large eruptions over the past two days, reported a German news agency.

The heightened alert was issued late on Wednesday after the 725m-high volcano had two large eruptions earlier in the day, spewing a column of ash 3,000m into the sky.

Centre for Volcanology and Geological Hazard Mitigation (PVMBG) head Hendra Gunawan said...