The United States banned its government from doing business with a North Korean official and two Chinese companies for fear that they could be helping the DPRK’s nuclear program.

According to a Federal Register announcement released on Friday, the U.S. State Department enacted non-proliferation measures on Rim Ryong Nam, a North Korean Munitions Industry Department (MID) official living in China, and two Chinese companies.

Rim and the two companies are accused of activities that have “the potential to make a material contribution to the development of weapons of mass destruction (WMD) or cruise