NEW YORK, March 10 (Reuters) - U.S. stocks extended losses on Thursday, with the S&P 500 hitting session lows amid global economic worries and turmoil in the Middle East, and as traders cited a report of Saudi police firing on protesters.
The Dow Jones industrial average dropped 219.93 points, or 1.80 percent, to 11,993.16. The Standard & Poor's 500 Index lost 23.69 points, or 1.79 percent, to 1,296.33. The Nasdaq Composite Index slid 48.84 points, or 1.77 percent, to 2,702.88.
(Reporting by Chuck Mikolajczak)