Authorities in Indonesia have raised the volcano emergency alert to its highest level after Mount Lewotobi Laki-Laki erupted, spewing volcanic ash an estimated 10km (6.2 miles) into the sky.

There were no immediate reports of casualties or damage on Wednesday, but authorities have warned residents and tourists on the eastern Indonesian island of Flores to keep away from the mountain and prepare for possible evacuation.

“The public should remain calm and follow the local government’s directions and not believe issues from unclear sources,” the country’s Centre for Volcanology and Geological Hazard Mitigation said in an alert notice.

The volcano erupted at 1:35am on Wednesday (Tuesday 18:35 GMT) for about nine minutes, Indonesia’s Geological Agency said in a statement, after also eru

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