The uranium enrichment plant where North Korean leader Kim Jong Un recently inspected new centrifuges is likely a covert facility near Pyongyang long suspected of being a nuclear site, according to analysis by the Open Source Team at the James Martin Center for Nonproliferation Studies of the Middlebury Institute and NK Pro.

Photos published in state media on Friday and satellite imagery point to a facility known as Kangson located west of the capital, which underwent construction to expand floor space earlier this year.

The photos appear to confirm the existence of a second uranium