Gunmen shot dead a US aid worker and his driver in the northwestern Pakistan city of Peshawar on Wednesday, the US embassy and police said. "I can confirm that an American citizen and his Pakistani driver were killed in the attack," Wes Robertson, a spokesman for the US embassy, said. The two were in a car belonging to an organization involved in a US-funded development programme in the restive tribal areas bordering Afghanistan. "The gunmen ambushed the car and shot dead a foreign national and his driver in the city's University Town neighbourhood," local police officer Abdul Qadir said. A security official in Peshawar identified the man as an official with the US-funded FDP, the federally-administrated tribal areas' development programme. "He was heading towards his office in the University Town area where the attack happened," an FDP official said, on condition of anonymity. "The attack is currently under investigation and we are coordinating with the local authorities," the US embassy spokesman said.