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Two experts from Pyongyang university detained in three weeks

News of detention follows accusations of plot to kill Kim Jong Un

CNN  — 

In the last three weeks, two US citizens have been detained by the North Korean regime.

Both men work at Pyongyang University of Science and Technology, one of the few schools to employ foreign experts in North Korea.

Kim Hak-song, an ethnic Korean, born in Jilin, China, and educated at a university in California, was detained Saturday on suspicion of “hostile acts” against the regime, state media reported.

In April, Kim Sang Duk, also known as Tony Kim, was also detained for “hostile acts” while trying to fly out of Pyongyang International Airport.