The United States has filed a complaint to forfeit over three-point-one million U.S. dollars from three companies based in Singapore and China for helping North Korea launder money.<br />The U.S. Justice Department says.... firms called Apex Choice and Yuanye Wood... and a Singapore-based company --that wasn't named -- laundered cash on behalf of sanctioned North Korean banks.<br />The banks used the money to buy goods for the regime.... and to illegally access the U.S. financial market.<br />This becomes the fourth case of the U.S. forfeiting assets of foreign firms that violated North Korea sanctions. <br />