Indonesian officials have more than doubled the size of the no-go zone around the Mount Agung volcano and raised its alert level for the second time in less than a week, the Associated Press reported.
A 7.5km exclusion zone has been set up in the resort island around the volcano's crater and a 14-day emergency alert period is now in place, Sutopo Nugroho, a spokesman for the National Disaster Management Agency said, according to The Australian newspaper.
There has been an increase in seismic activity at Mount Agung, sparking fears the volcano could erupt.
"The BNPB will continue to provide assistance to regional disaster mitigation agencies [BPBDs] in taking anticipatory measures against the possible eruption of Mt. Agung [.]", he said during his visit to the Mt. Agung observation post.
The alert level will be raised to 4, or "dangerous", if it becomes clear an eruption is about to happen.
"Volcanoic ash is a really big problem for airlines because if that ash gets into engines, it can shut them down and there has been occurrences where aircraft have lost all their engines after flying through volcanic ash and that's why they take a really cautious approach", he said.
The tour operator's local office said the volcanic ash from Mount Agung had not impacted on Besakhi temple, a popular tourist destination, situated close to the volcano. "We are prepared, I believe we can handle everything", Governor Made Mangku Pastika told the site.