A volcano erupted Friday in eastern Papua New Guinea, spewing rocks and ash into the air and forcing the evacuation of local communities, seismologists and reports said.
Mount Tavurvur, which destroyed the town of Rabaul when it erupted simultaneously with nearby Mount Vulcan in 1994, rumbled to life early in the morning on the tip of the island of New Britain.
"The eruption started slow and slowly developed in a Strombolian (low level) eruption with incandescent projections accompanied by explosion noises and ongoing loud roaring and rumbling noises," the Rabaul Volcanological Observatory said.
The Australian government issued a warning against travelling to the area.
"Authorities have evacuated communities close to the volcano. Residents of Rabaul town have been advised to remain indoors to avoid falling ash," it said.
There were no immediate reports of injuries or damage.
The Volcanic Ash Advisory Centre in Darwin said the ash cloud was drifting southeast and had the potential to disrupt air travel.
"The eruption was to 60,000 feet, which is flight level. There was two hours of high level eruption," an official from the centre, Cyndee Feals, told AFP.
"The ash was initially blowing to the southwest but has now turned to the southeast and we expect it to clip the edge of Australian airspace later today, but we don't expect ash over Australia."
She said planes may be forced to take alternate routes with the ash forecast to move towards the Solomon Islands and then Vanuatu in the Pacific.
In Rabaul, the ground was covered in a layer of ash, local reports said.
"Police have cautioned people not to panic but remain indoors and listen to local Radio East New Britain for updates," the PNGloop website said.
"The situation has eased except for the rumbling and roaring as rocks are shot into the air."
The 688-metre (2,270-foot) volcano has erupted several times before, notably 20 years ago.
In 1994, major eruptions at both Tavurvur and nearby Mount Vulcan destroyed much of Rabaul, and while loss of life was minimal due to a quick evacuation, looters ransacked the town.