Indonesia situated Mount Agung's volcanic tremors first began in September.

Special Correspondent

Since last week dark gas and ash have been billowing up to 3,400m (11,150ft) above the mountain's summit. The volcano is emitting "continuous ash puffs" with occasional "explosive eruptions" that could be heard 12km (7 miles) from the summit. "The rays of fire are increasingly observed at night. This indicates the potential for a larger eruption is imminent," it said in a statement (in Indonesian) on its Facebook page.

Tens of thousands of people stayed put near Mount Agung after an alert was raised to its highest level. Some still felt safe while others did not want to leave livestock.

A spokesman for the Indonesia's National Disaster Management Agency (BNPB) said people were checking the exclusion zone for non-evacuees.