Washington/Seoul, July 9 (TIWN) New satellite imagery has revealed a previously undeclared North Korean facility that experts suspect could be used to build nuclear warheads, a media report said on Thursday.

The imagery, captured by Planet Labs and analyzed by experts at the Middlebury Institute of International Studies, indicates that the facility, which is in the village of Wollo-ri near the country's capital city of Pyongyang and has not been previously disclosed to the public, is believed to be linked to North Korea's nuclear program and remains active.