U.S. President Donald Trump said on Thursday he had signed an executive order that would allow the United States to ramp up sanctions on North Korean firms in an effort to dissuade Pyongyang from pursuing its nuclear missile program.

"Our new executive order will cut off sources of revenue that fund North Korea's efforts to develop the deadliest weapons known to humankind," he told reporters ahead of a luncheon meeting with the leaders of Japan and South Korea.

He said North Korea's textiles, fishing, information technology, and manufacturing industries were among those the United States could target. (Reporting by Steve Holland; Editing by Tim Ahmann and Grant McCool)

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