The U.S. sanctions are "a manifestation of heinous intention to throw a wet blanket over the inter-Korean exchange and cooperation and to aggravate the situation," an unnamed North Korean foreign ministry spokesman said in a report by the Korean Central News Agency.
It also said the United States should stop such "anachronistic" policy towards North Korea.
The United States announced new sanctions on Wednesday aimed at stopping North Korea's nuclear weapons development and urged China and Russia to expel North Koreans raising funds for the programs.
It said two China-based trading firms were involved in exporting millions of dollars worth of metals and other goods used in weapons production.
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