A powerful earthquake shook the southern Philippines, triggering landslides and loosening boulders that killed six people and injured more than 100 others in a region already damaged by a strong tremblor two weeks earlier, officials said.

The magnitude 6.8 quake was caused by the movement of a fault about 4.3 miles deep about 16 miles east of Tulunan in Cotabato province, the Philippine Institute of Seismology and Volcanology said.
About 90% of the houses in three rural villages were damaged by the intense ground movement. Davao city also shook from the quake.