The U.S. Air Force’s supersonic B-1B strategic bombers conducted “nuclear bomb dropping drills” over the Korean Peninsula on Monday, North Korea’s state-run outlet the Korean Central News Agency (KCNA) reported on Tuesday.

KCNA’s report is notable: neither South Korea’s Ministry of National Defense (MND) or United States Forces Korea (USFK) announced the joint military drills prior to their taking place.

“On May 1, the U.S. imperialists committed one more military provocation of conducting a nuclear bomb dropping drill against the major objects of the DPRK in the sky over South Korea,” KCNA said in an English dispatch.

Describing the B-1B