N. Korea detains US citizen: Yonhap news agency

A US citizen has reportedly been arrested as he tried to fly out of North Korea, becoming the third American to be detained there, South Korea's Yonhap news agency said Sunday.The US State Department said it was aware of the reports, but there was no official confirmation of the arrest, which would come at a tense time in relations between Pyongyang and Washington.Yonhap quoted sources as saying the man, identified only by his surname Kim, was arrested on Friday at Pyongyang International Airpor