At least 50 militants were killed and their ammunition dump destroyed Monday in air strikes on hideouts in northwest Pakistan near the Afghan border, the military said.

The strikes targeted hideouts in the Gharlamai and Shawal areas of the lawless North Waziristan tribal region, where the army has been waging an offensive against Taliban militants since June last year.

"At least 50 terrorists were killed in precise air strikes in Shawal and Gharlamai this afternoon. There are reports that the terrorists' infrastructure in the area, including their ammunition dump, is badly damaged," the military said in a statement.

On Sunday the military said it had killed at least 40 militants in the Shawal area.

The death toll could not be independently verified as the conflict zone is remote and off-limits to journalists.

Pakistan has been battling a homegrown Islamist insurgency for over a decade.

Officials say more than 2,800 militants have been killed since the launch of the latest offensive.