At least four people were killed Saturday by an unmanned US aircraft in Pakistan's north-western tribal region along Afghan border, an official said. The early morning strike took place in the Bazar area of Miransha, the main town of North Waziristan, according to a report of DPA. "A US drone fired two missiles into a mud compound which destroyed it completely and killed four people," the official was quoted as saying by DPA. The identities of the dead were not known yet, he said.