A major earthquake has struck off western Sumatra, Indonesian officials say.
A tsunami watch has been issued following the 7.5 magnitude quake near the Mentawi Islands at a depth of 33km (20.5 miles), officials said.
The epicentre was reported to be 244km (152 miles) south of the city of Padang.
There have so far been no reports of damage or casualties. Indonesia is regularly affected by earthquakes.
A statement from the Pacific Tsunami warning centre said that only coasts within 100km (62 miles) of the epicentre were at risk.
More than 1,000 people were killed by an earthquake off Sumatra in September 2009.
In June at least three powerful earthquakes struck the region, bringing down homes and leaving three people dead.
In December 2004, a 9.1-magnitude quake off the coast of Aceh triggered a tsunami in the Indian Ocean that killed a quarter of a million people in 13 countries including Indonesia, Sri Lanka, India and Thailand.
Indonesia sits on the Pacific “Ring of Fire”, one of the world’s most active areas for earthquakes and volcanoes.
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