PESHAWAR, Pakistan — Pakistani fighter jets killed at least 35 people in attacks on militant bases in a remote part of the North Waziristan tribal district, the military said Wednesday, hours after local residents reported that a U.S. drone strike in the same area had killed an additional 20 people.

A Pakistani intelligence official said fighter jets carried out airstrikes in the Shawal Valley, a remote forested area that has become a sanctuary for al-Qaida and Taliban fighters, and in several nearby districts.

The strikes targeted fighters who had fled Miram Shah and Mir Ali, the two main towns in North Waziristan that were largely abandoned by civilians and militants shortly after the start of the military offensive June 15.

Hours earlier, residents said, a U.S. drone fired four missiles at a compound and a vehicle in Zoi Saidgai, about 30 miles west of Miram Shah and close to the Afghan border. Speaking by phone, residents said that 20 people were killed in the strike including 12 foreigners of Central Asian origin and eight local militants.