The U.S. Treasury Department on Tuesday issued new designations against entities and individuals in China, Russia, Singapore, and Namibia for supporting North Korea’s weapons programs, mineral trade and use of overseas labor.

Treasury’s Office of Foreign Assets Control (OFAC) targeted companies and individuals which bought coal and minerals from the DPRK, as well as others involved in the country’s oil trade.

Other sanctions were also aimed at North Korean companies and their representatives for continued use of overseas labor in Namibia.

“It is unacceptable for individuals and companies in China, Russia, and elsewhere to enable North Korea to generate income