Wall Street extended losses on Friday, as increasing worries about the ramifications of heavy euro-zone debt loads overshadowed encouraging U.S. economic data.

The Dow Jones industrial average <.DJI> dropped 162.57 points, or 1.51 percent, to 10,619.86. The Standard & Poor's 500 Index <.SPX> dropped 20.13 points, or 1.74 percent, to 1,137.31. The Nasdaq Composite Index <.IXIC> dropped 51.49 points, or 2.15 percent, to 2,342.87.

(Reporting by Chuck Mikolajczak; editing by Jeffrey Benkoe.)