Pakistan's army says its jets and ground forces have destroyed six militant hideouts in a northwestern tribal region, killing nine "terrorists" in the latest operation near the Afghan border.

The military says its warplanes also destroyed an ammunition dump used by militants in the Khyber tribal region.

It provided no further details about Saturday's strikes and the information could not be independently confirmed as journalists are barred from entering tribal areas. The military says it has killed 35 militants in the latest operation, which was launched in Khyber earlier this week.

Pakistan has been waging military offensives against militants in the country's tribal regions since June 2014.

The army has claimed success, but militants have still managed to launch attacks in major cities.