Pakistani police Tuesday questioned a man they said was a US national arrested near the Afghan border in the remote tribal region known to be a hub of Al-Qaeda and Taliban militants. The man was dressed as a local and was travelling without any travel documents, police said. "Officers arrested a young American national as he was entering the Mohmand tribal region on Monday evening," local policeman Khurshid Khan told a foreign news agency. "The bearded man was aged 20-25 and wore a traditional Pakistani shalwar kameez. He said he was visiting a friend."