North Korea detains third US citizen

North Korea detained a US citizen on Saturday as he attempted to leave the country, bringing the total number of Americans held by the isolated country to three. Korean-American Tony Kim had spent a month teaching an accounting course at the Pyongyang University of Science and Technology (PUST), the university's chancellor, Chan-Mo Park, told Reuters on Sunday.
Kim, who also goes by his Korean name Kim Sang-duk and is in his fifties, was detained by North Korean officials at Pyongyang International Airport as he attempted to leave the country, Park said.
"The cause of his arrest is not known but some officials at PUST told me his arrest was not related to his work at PUST. He had been involved with some other activities outside PUST such as helping an orphanage," Park said.