A new CSIS report reveals North Korea operates a secret missile base at Sinpung-dong, just 27 km from the Chinese border, capable of housing up to nine nuclear-armed ICBMs and mobile launchers.

The site, operational since 2014, is part of Pyongyang’s undeclared missile infrastructure and could threaten East Asia and the U.S. mainland.

Analysts say its proximity to China provides strategic protection, complicating potential strikes, CNN has reported.

The report warns the base is well-maintained, concealed, and integrated into North Korea’s broader “missile belt,” highlighting Kim Jong Un’s push to expand nuclear deterrence amid closer ties with Russia and defiance of UN sanctions.