A US unmanned drone on Monday fired four missiles into Pakistan's tribal region along Afghan border, killing a dozen people, officials were quoted as saying by the German Press Agency "DPA". The attack took place in North Waziristan district. An official said that the two missiles destroyed a vehicle and two more hit a compound in Khushali area of the district. "According to the reports we have received four people died in the attack on vehicle while eight were killed in the compound," said the official.