A suspected U.S. missile strike by a drone aircraft killed 20 local and foreign fighters, intelligence officials said.
At least 15 fighters were also wounded in the attack in the restive South Waziristan tribal region.
The Taliban surrounded the targeted house and transported the dead and wounded out, said three intelligence officials who spoke on condition of anonymity because they were not authorized to talk to the media.
No government or military spokesmen were available for comment.
The U.S. has launched more than 30 missile attacks in recent months.
Saturday's attack came days after Pakistani leaders told Richard Holbrooke, an American envoy dispatched by President Barack Obama to the region, that the U.S. attacks should be stopped as they were counterproductive and fueling anti-America sentiment in this Islamic nation.
PHOTO CAPTION
A protest rally against the US missile strike in Pakistan's tribal areas.
Agencies