Pyongyang’s state-run Rodong Sinmun newspaper on Monday criticized use of anthrax in South Korea, which was revealed by a joint ROK-U.S. joint working group’s (JWG) investigation last Thursday.

Repeating its allegations of biological warfare during the Korean War, the newspaper blamed the U.S. for the “criminal activity.”

It also criticized Seoul’s position.

“Conducting biological weapons experiments randomly, with anthrax and plague targeting its own people, is it fine for cooperation with the U.S., and putting its residents in danger?” it said.

United States Forces Korea (USFK) delivered 15 anthrax test samples to South Korea between 2009 and 2014, according to