The names, birthdays, and addresses of 997 North Korean refugees living in South Korea have been leaked, South Korea’s Ministry of Unification (MOU) confirmed to local media on Friday.

The leak purportedly took place following the hacking of a computer at a government-run defector “Hana” resettlement center in North Gyeongsang Province.

“We carried out an on-site probe on Dec. 19 in cooperation with the provincial government and the center and confirmed the computer was infected with a malicious code,” the MOU was quoted as having said in a statement carried by Yonhap News Agency.

“In that computer, there was a file