Wall St. closes lower on North Korea concerns

NEW YORK (Reuters) - U.S. stocks sank on Tuesday, with the S&P 500 stumbling to its biggest single-day loss in about three weeks, as investors weighed fresh tensions with North Korea.

The Dow Jones Industrial Average <.DJI> fell 234.45 points, or 1.07 percent, to 21,753.11, the S&P 500 <.SPX> lost 18.62 points, or 0.75 percent, to 2,457.93 and the Nasdaq Composite <.IXIC> dropped 59.76 points, or 0.93 percent, to 6,375.57.

(Reporting by Chuck Mikolajczak; Editing by Nick Zieminski)