A detail satellite imagery analysis report on North Korea’s Yodok political prison camp (Camp 15) published February 13 has concluded that the facility is still operational.

The report is part of a collaborative project between the U.S.-based Committee for Human Rights in North Korea (HRNK) and AllSource Analysis (ASA), which seeks to utilize satellite imagery to monitor North Korea’s prison camp system and human rights violations.

“Camp 15 remains an operational political prison camp and is, by DPRK standards, a mature and well-maintained facility,” the report’s executive summary read.

The camp, located 119 km northeast of Pyongyang in South Hamgyong, is