6.8-magnitude quake off the Philippines: USGS

A 6.8-magnitude earthquake struck off the Philippines Saturday, the US Geological Survey said, but there were no immediate reports of casualties or damage.

It struck at a depth of 41 kilometres (25 miles) in Mindanao, more than 700 kilometres southeast of the capital Manila, the USGS said.

The Pacific Tsunami Warning Center advised that hazardous tsunami waves were possible off the coasts of the Philippines and Indonesia.

The Philippines lies on the so-called Ring of Fire, a vast Pacific Ocean region where many of Earth's earthquakes and volcanic eruptions occur.