KEY POINTS
  • Mattis remarks made in written testimony to House Armed Services Committee
  • Says North Korea's missile, nuclear programs a "clear and present" danger
U.S. Defense Secretary James Mattis briefs the media at the Pentagon in Washington, U.S., April 11, 2017.

U.S. Defense Secretary Jim Mattis said on Monday that North Korea's advancing missile and nuclear programs were the "most urgent" threat to national security and that its means to deliver them had increased in speed and scope.

"The regime's nuclear weapons program is a clear and present danger to all, and the regime's provocative actions, manifestly illegal under international law, have not abated despite United Nations' censure and sanctions," Mattis said in a written statement to the House Armed Services Committee.