North Korea has reportedly arrested a U.S. citizen and professor from the Pyongyang University of Science and Technology who has identified himself as a Christian. He is now the fourth American held by Kim Jong-un’s regime. The state-run KCNA news agency said Kim Hak-song was detained on May 6, becoming the second U.S. citizen arrested from the evangelical-funded PUST, and the fourth American to currently be held.

North Korean officials said that they were conducting a “detailed investigation” of Kim Hak-song’s alleged crimes and gave no further details, though Reuters cited online posts from the professor, who identified himself as a Christian missionary. Korean-American Tony Kim, who also goes by his Korean name Kim Sang-duk and is in his 50s, was the first to be arrested last month from PUST. The charges against him have also not been made clear. READ MORE