AP PHOTO Fallen debris from a business establishment are seen following a powerful nighttime earthquake that rocked Surigao city, Surigao del Norte province Saturday, in southern Philippines.

SURIGAO, Philippines — A powerful nighttime earthquake in the southern Philippines killed at least six people and injured more than 120, with officials combing through cracked buildings and nearby towns Saturday to check on the damage and other possible casualties.

The magnitude 6.7 quake roused residents from their sleep late Friday in Surigao del Norte province, forcing hundreds of people to flee their homes.

Nearly 100 aftershocks have been felt, officials said.

At least six people were killed, mostly after being struck by falling debris and concrete walls, provincial disaster-response official Gilbert Gonzales said. At least 126 others were injured in Surigao, where the quake knocked out power and forced the closure of the domestic airport due to deep cracks in its runway, officials said.