University employee Kim Hak Song is the fourth American to be held.
An American citizen has been detained in North Korea over unspecified hostile acts against the country.
North Korea’s official Korean Central News Agency (KCNA) said Kim Hak Song, an employee of the Pyongyang University of Science and Technology, was detained on Saturday.
North Korea on Wednesday announced the detention of an accounting instructor at the same university, Kim Sang Dok, for “acts of hostility aimed to overturn” the country. The KCNA did not say whether the two cases are connected.
“A relevant institution is now conducting detailed investigation into his crimes, ” the KCNA said about Kim Hak Song.
Kim Hak Song is among at least four Americans being detained in North Korea. The others are Otto Warmbier, serving a 15-year prison term with hard labour for alleged anti-state acts, and Kim Dong Chul, serving a 10-year term with hard labour for alleged espionage.
Kim Sang Dok, the former accounting instructor at the Pyongyang university, was arrested at the Pyongyang International Airport on April 22, the KCNA said. It said he was “intercepted for committing criminal acts” to overthrow the North’s government.
The Pyongyang University of Science and Technology is the only privately-funded university in North Korea and is unique for having a large number of foreign staff.
Washington, Seoul and others often accuse North Korea of using foreign detainees to wrest diplomatic concessions, which in recent years have involved high-profile American missions sent to secure the release of the Americans.
North Korea’s announcement of the detentions comes amid tensions over fears that Pyongyang is preparing another round of nuclear or missile tests.
US President Donald Trump has further spiked animosity by saying he is not ruling out military action against the North, although he has also said he would be willing to talk with North Korean leader Kim Jong Un under the right circumstances.
North Korea on Friday accused the US and South Korean spy agencies of an unsuccessful assassination attempt on Kim Jong Un involving biochemical weapons.
