One American touring the Joint Security Area (JSA) at the inter-Korean border on Tuesday crossed over to the North Korean side, the United Nations Command said.

“A U.S. National on a JSA orientation tour crossed, without authorization, the Military Demarcation Line into the Democratic People’s Republic of Korea [DPRK],” the UN Command said in a statement, referring to the North by its official name.

The command said the U.S. citizen was “in DPRK custody,” adding that it was communicating with the North Korean military to “resolve this incident.”

BY ESTHER CHUNG [chung.juhee@joongang.co.kr]