Indonesian authorities say the death toll from a strong earthquake in a western province has risen to 22.

The magnitude-6.1 quake Tuesday injured more than 200 other people and damaged more than 1,500 houses and buildings in Aceh province.

Sutopo Purwo Nugroho of the National Disaster Mitigation Agency said 12 people were killed and 70 others were injured by a landslide or collapsing buildings in the worst-hit area of Bener Meriah.

He said 10 more people were killed and 140 injured in neighbouring Central Aceh district, where about 1,500 houses and buildings were damaged.

The quake also caused concern among officials attending a meeting of the Asia Pacific Economic Co-operation forum in Medan, the capital of neighbouring North Sumatra province. They were escorted from the second-floor meeting room by security officers.

Indonesia is prone to seismic upheaval due to its location on the Pacific Ring of Fire, an arc of volcanoes and fault lines encircling the Pacific Ocean.

In 2004, a huge earthquake off Aceh triggered a tsunami that killed 230,000 people across Asia.