For the third day, Pakistani forces continue to pound suspected militant hideouts in the North Waziristan area along the Afghan border.
Pakistani officials said some 80 militants have been killed so far, although that figure is impossible to independently verify.
Reports said Pakistani forces fired mortars into the area of Matchis Camp, Kharwani, and Sukhail Wazir during their latest attacks.
Militants launched counterattacks that killed about 10 Pakistani troops, including an officer.
In some parts of North Waziristan, the artillery and air barrage appears to have lifted and troops are fanning out as part of a search operation.
Washington has been calling on Islamabad for months to launch an operation against militants in the tribal areas.
With reporting by AFP