INTERNATIONAL NEWS - Indonesian authorities have raised the state of alert to its highest level.
The island's airport has now closed, leaving thousands stranded in the tourist hotspot.
Authorities say dark smoke and ash have been billowing up to 3,400m (11,150ft) above the mountain's summit, which has also been emitting fire.
Officials have warned residents to stay away from rock and debris flows known as lahars, which have been spotted flowing down from the mountain.