At least four people were killed in a U.S. drone strike launched in North Waziristan Agency early Thursday morning.According to the media reports, the strike took place at pre-dawn time when U.S. unmanned aircraft fired two missiles at a house suspected of being a militant hideout in the Mir Ali area of North Waziristan.As a result, four persons were killed.On Dec. 1, the U.S. drones launched a strike in South Waziristan, the neighboring tribal area of North Waizirstan, killing at least four people including an al-Qaeda leader named Abdul Rehman Azman, a Yemeni national believed to be one of the close aides of the former al-Qaeda chief Osama bin Laden.Thursday's U.S. drone strike is the 37th of its kind  in Pakistan in 2012.At least 265 people have been killed in such strikes since this year.