North Korea's official Korean Central News Agency reported on Saturday that authorities had arrested South Korean Joo Won-moon, 21, and charged him with illegally entering the country, according to The New York Times.
Joo has reportedly resided in New Jersey and holds a permanent resident status in the United States; the news agency said he is a student at New York University. A spokesman for NYU said a student called Won Moon Joo is listed as a junior at the Stern School of Business, but that he is not enrolled in classes and "the university was unaware of his travels."
The Korean Central News Agency reported that Joo was arrested on April 22 after he crossed the North Korean border via the Yalu River, which separates an area of China from the hermit kingdom. South Korean officials did not immediately confirm or deny the report.