Lava flows from crater of Mount Sinabung during an eruption in Karo, Indonesia, on Sunday
A huge volcano in Indonesia erupted on Sunday, spewing hot ash into the air.

Thousands were evacuated after Mount Sinabung in Karo, Indonesia, started erupting and spewing ash half a kilometre into the air.

The volcano began erupting in 2010 after lying dormant for four centuries.

A large eruption in May 2016 killed seven people.

Meanwhile, more than 3,000km away in Bali, Mount Agung has been threatening to erupt for weeks,

Disaster Mitigation Agency spokesman Sutopo Purwo Nugroho has Mount Agung is 'very dangerous' and could explode anytime.

It's been at its highest alert level since September 22, sparking an exodus of more than 140,000 people from the area.

Mount Agung last erupted in 1963, killing more than 1,100 people.