Almost 50 people have been confirmed dead after a strong tsunami triggered by a magnitude 7.5 earthquake hit a coastal Indonesian city on Friday.
Waves of up to 2m (6.6ft) high swept through Palu on Sulawesi island.
Video on social media shows people screaming and fleeing in panic and a mosque amongst the buildings damaged.
Last month, a series of deadly earthquakes struck the Indonesian island of Lombok, with the biggest, on 5 August, killing more than 460.
Indonesia's disaster agency said at least 48 people have been killed from the latest quake but that the figure could rise.
Palu is home to more than 300,000 people. Rescue operations have started but a minister said that communications had been disrupted and that the runway in the city was damaged, although it was hoped that helicopters would still be able to land.
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