WASHINGTON—A North Korean citizen was taken into U.S. custody on Saturday after being extradited from Malaysia to face money laundering charges, making him the first North Korean extradited to the U.S. to face trial. Mun Chol Myong was in the custody of the FBI in Washington on Saturday, according to documents obtained by The Associated Press. His extradition came after a Malaysian court rejected his assertion that the charges were politically motivated. A spokesperson for the Justice Department did not immediately respond to a message seeking comment on Sunday. A federal judge in Washington had issued a warrant for Mun’s arrest on May 2, 2019, on money laundering and conspiracy charges. Mun, who is in his 50s, has lived in Malaysia for a decade and was arrested in May 2019 after the United States requested his extradition. Malaysia’s government approved the extradition, but Mun challenged the bid. His lawyer has …