Tsunami alerts have been issued after a magnitude 7.8 earthquake struck Mindanao in the Philippines.
US, Indonesian and Philippine agencies all published warnings and told people to move inland or seek higher ground.
However, Indonesian authorities have now stood down their alert.
The Pacific Tsunami Warning Center said waves of up to three metres were possible in the Philippines, while Malaysia might get swells of up to a metre.
The biggest tsunami wave seen so far in the Philippines on Monday is 1.4 metres, according to Phivolcs, the national seismology agency
There are some reports of some buildings and President 'Bongbong' Marcos urged people in the Philippines to immediately heed all warnings.
Phivolcs and the US Geological Survey (USGS) both measured the quake at magnitude 7.8 - the strongest to hit the country this year.
It occurred at a depth of 20 miles (33km) at 7.37am and a series of small aftershocks were still being felt.
"It's a major earthquake and we're expecting damages and we've already some damaged buildings based on videos we've seen," said Phivolcs director Teresito Bacolcol.
A video filmed in General Santos City showed a small building collapse and authorities there said they were assessing reports of damage and injuries.
Meanwhile, a police chief in Mindanao's Sarangani province told Reuters it was the "strongest earthquake we've experienced".
Read more from Sky News:
Denmark footballer Christian Eriksen collapses on pitch
Zelenskyy confirms Abramovich role as 'go-between' with Putin
People in Indonesia's North Sulawesi and North Maluku provinces also felt the earthquake but the country's disaster agency said there were no reports of damage so far.
Indonesia and the Philippines lie in the Pacific "ring of fire" - a string of underwater volcanoes and sites of increased seismic activity that stretches about 25,000 miles.
Both nations experience hundreds of earthquakes every year.
(c) Sky News 2026: Tsunami alert after 7.8-magnitude earthquake hits the Philippines
Gloves left inside patients and accidental organ removal among 403 'never' mistakes in NHS last year
Denmark footballer Christian Eriksen collapses on pitch
'I've never experienced this level of resentment': Sikh community facing backlash after Henry Nowak murder
Three people stabbed in east London
Mix of heavy rain and sun expected this week ahead of warmer temperatures