UN Command says it believes the person is in custody after crossing into North Korea without approval.

A man detained in North Korea is a United States soldier who entered the country “willfully and without authorization” by crossing the military demarcation line, according to officials.

The United Nations Command, which has helped oversee the Demilitarized Zone (DMZ) between South Korea and North Korea since an armistice ended fighting in the 1950-1953 Korean War, said on Tuesday the individual had been taking part in a tour when he crossed into North Korea.