MANILA, Philippines (AP) _ Police have discovered the bodies of two men and a woman in three ash- covered villages, raising the death toll from the eruptions of Mount Pinatubo to 341, officials said today.

Also today, Philippine troops arrested three men for stealing aviation fuel from a pipeline to the U.S. Clark Air Base that was exposed by rolling volcanic debris.

The volcano shuddered from a mild eruption early today, raining ash on three towns, the Philippine Institute of Volcanology and Seismology reported. The institute said Pinatubo belched ash six miles high and was shaken by hundreds of little quakes and low frequency tremors that indicate magma was rising to the surface.

Dominador Domingo, Zambales police superintendent, said a search team discovered the bodies Sunday inside homes that collapsed under the weight of volcanic ash in three Subic villages.

The 5,758-foot Mount Pinatubo, 62 miles northwest of Manila, began erupting June 9 after being dormant for 600 years.