The eruption sent smoke and ash 700 metres into the air over the crater. A 4km exclusion zone for climbers and tourists has been put in place.
Mount Agung in east Bali is around 75km from Kuta, one of the island’s most popular tourist destinations.
“Residents near Mount Agung, as well as climbers and tourists, should not carry out any activity in the danger zone or within [a] four-kilometre radius from the crater," said the island’s volcanology officials in a statement.
“The eruption occurred at 4.09am local time but the height of the ash column could not be measured because of the heavy fog."
Flights continue to operate to and from Bali and no additional evacuation orders or exclusion zones have been enacted.
