Wall Street opened flat on Tuesday as investors returned after a long weekend, with focus on U.S. manufacturing data and an upcoming meeting of European Central Bank policymakers.

The Dow Jones industrial average <.DJI> dropped 10.42 points, or 0.08 percent, to 13,080.42. The Standard & Poor's 500 Index <.SPX> shed 0.60 points, or 0.04 percent, to 1,405.98. The Nasdaq Composite Index <.IXIC> lost 0.60 points, or 0.02 percent, to 3,066.37.

(Reporting by Chuck Mikolajczak, editing by Dave Zimmerman)