Mount Bromo, a popular tourist attraction, began rumbling earlier this month and the government issued an alert over heightened danger levels in the area on Tuesday.

"Bromo has shot gray ash up to 700 metres (2,300 feet) into the sky this morning. It was a low-level eruption," volcanologist Agus Budianto said.

The volcano also belched ash on Friday afternoon, in which it shot ash up to 500 metres.

"Nobody was hurt and evacuation is not needed at this time. We hope that there won't be an explosive eruption from Bromo," Budianto said.

Bromo erupted in 2004, killing two people.

Indonesia's most active volcano, Mount Merapi, has killed more than 320 people since it began erupting late last month.

Unlike Merapi, the countryside around Bromo is not densely populated as it lies within the Bromo-Tengger-Semeru National Park.

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