
Based on an analysis of key physical features, political prison camp (kwan-li-so) no. 25, established around 1968, remains an operational prison. The prison camp is well maintained by North Korean standards. The estimated population, based on imagery analysis of the compound, is between 2,500 and 5,000 prisoners.

Although North Korea officially announced the closure of Kwan-li-so No. 18 in 2006, commercial satellite imagery analysis indicates that the camp has not been completely razed. Imagery analysis further indicates that the remaining facility, whether officially designated as such or not, is a large and active detention facility.