At least 20 people were including an Al-Qaeda leader were killed and several others injured in US air strike in Mir Ali, North Waziristan while more casualties were expected.

According to BBC, US drones fired two missiles in Essori village two kilometers away from Mir Ali between Friday and Saturday night.

The drones targeted the house of tribal leader Maulvi Amman Ullah in which 20 people died and several were injured.

According to Intelligence Agencies officials, an Iraqi national Al-Qaida leader Abu Akkash was among the dead.

It is pertinent to mention that the drones made low level flights and tribesmen started firing on the drones.