An F-15E fighter jet has intercepted a small passenger plane flying near the presidential retreat of Camp David, where President Barack Obama is relaxing, US military officials said. The North American Aerospace Defense Command said one of its F-15 fighters was dispatched yesterday when a civilian airplane was detected flying towards Camp David airspace in Maryland. The US President is spending his holiday weekend there with his family. The intruding aircraft was called a two-seat general aviation craft. The plane was out of radio communication and six miles away from Camp David when the F-15 headed it off. Escorted by the fighter jet, NORAD said, the plane was shepherded to Hagerstown, where it was forced to land. Law enforcement met the pilot on the ground. Authorities said the plane had been flown out of Salisbury.