Philippines earthquake: Pregnant woman killed by Mindanao quake

A pregnant woman has died, four people injured, and nine are missing after a powerful earthquake hit the Philippines' second-largest island of Mindanao.

Defence secretary Gilbert Teodoro said 529 families have been affected.

The US Geological Survey measured the first tremor late on Saturday at 7.6 magnitude, followed by four major aftershocks exceeding 6.0.

The quakes had triggered tsunami warnings that were later lifted.

The Philippine Institute of Volcanology and Seismology measured the quake at 7.4, and recorded at least 600 aftershocks with magnitudes raging from 1.4 to 6.2.

People were seen rushing out of buildings and staying in open areas after the first tremor

Earlier, residents of coastal areas of Surigao Del Sur and Davao Oriental had been told to evacuate to higher ground after the first earthquake at about 22:37 local time (14:37 GMT) off Mindanao's eastern coast.

People in several towns not far from the quake's epicentre were seen rushing out of buildings and staying in open areas. In Butuan City, patients were evacuated from a hospital.

In the Hinatuan municipality - about 21km from the epicentre - crowds gathered at evacuation centres. Disaster officials there are inspecting villages for damage and casualties.

One disaster official for Bilsig City told AFP that there have been no reports of major damage to buildings or infrastructure so far, but some roads in the city in the Surigao Del Sur province were cracked during the quake and the aftershocks.

In Japan, north-east of the Philippines, tsunami waves of up to 0.4m (1.3ft) were later observed on some outlying islands.

The two island nations are part of the Pacific "Ring of Fire" - a zone of major seismic activity which has one of the world's most active fault lines.

The Mindanao quakes come nearly two weeks after a 6.7 magnitude quake hit the island, killing at least nine people, shaking buildings and causing part of a shopping mall ceiling to collapse.