Manila: A powerful undersea earthquake struck off the southern Philippines on Saturday, prompting people to scramble out of shopping malls and buildings and authorities to warn villagers to stay away from beaches in case of a tsunami.

No casualties or damage were reported hours after the quake struck before noon, and the Pacific Tsunami Warning Centre lifted its warning for a potential tsunami that it had said could hit coastal areas of the southern Philippines and Indonesia.

The Philippine Institute of Volcanology and Seismology said the quake was detected at a depth of 59 kilometres and a magnitude of 7.2 about 162 kilometres off Davao Oriental province. Several aftershocks, including one with a magnitude of 5.6, were later felt by residents but no major damage was reported, officials said.

The US Geological Survey said the quake had a magnitude of 6.9.

Shortly after the quake struck, Renato Solidum, who heads the quake-monitoring institute, said a major tsunami was unlikely given the quake's depth but his agency advised villagers to avoid beaches in Davao Oriental province and outlying coastal regions for about two hours after the quake hit around noon as a precaution.