US drones fired two missiles into a compound in Pakistan's northwestern tribal belt Friday, killing at least nine militants and wounding more than five others, local security officials said.

The attack took place in a village on the border of North and South Waziristan tribal areas, around 50 kilometres (30 miles) south of Miranshah.

"Six drones were hovering in the sky at the time of the attack. One drone fired two missiles at a house," a security official in Miranshah told AFP.

"At least nine militants were killed and more than five were injured in the strike. Their identities were not clear yet, but there may be some foreigners among them," he said.

"The compound was completely destroyed. The militants had surrounded the area after the attack," the official added.