The quake hit at 07:37 local time on Monday (Sunday 23:37 GMT), triggering tsunami alerts in the Philippines, Indonesia, Japan and Australia. Some of those were cancelled hours later. Videos and images showed buildings collapsing, including a clip of a Jollibee fast food restaurant reduced to rubble, and landslides have been recorded in some areas. More than 100 people have been injured across several provinces, almost two dozen are missing, and 10,000 residents have been pre-emptively evacuated, authorities have said. Mindanao is the Philippines second-biggest island - both in size and population - and is home to around 26 million people. Casualty numbers still need to be verified by the National Disaster Agency, which tabulates and verifies reports by various local sources and is expected to provide an official update in the coming days. Local authorities in the coastal province of Sarangani, about 20km (12.5 miles) from the quake's epicentre, said 17 people had died there, many of them in a landslide. The quake temporarily downed power and communication networks in Sarangani - though they were later restored.

In General Santos, the city nearest the epicentre, 10 people were killed, the Office of Civil Defence said. Another 22 people remain missing. General Santos, known as the Philippines' tuna capital, is also known as the hometown of Manny Pacquiao, the world boxing champion who later became a politician. South Cotabato and Sultan Kudarat were also hard hit. (BBC)