U.S. stocks closed narrowly mixed on Tuesday as Wall Street digested U.S. President Donald Trump's decision on the Iran nuclear deal.

The Dow Jones Industrial Average increased 2.89 points, or 0.01 percent, to 24,360.21. The S&P 500 decreased 0.71 points, or 0.03 percent, to 2,671.92. The Nasdaq Composite Index was up 1.69 points, or 0.02 percent, to 7,266.90.

Trump said Tuesday that the United States will withdraw from the Iran nuclear deal, a landmark agreement signed in 2015.

In a televised speech, Trump announced the exit, adding he will not sign the waiver of nuke-related sanctions against Iran.

Trump repeated his tough stance on the deal, saying it had failed to prevent Iran from developing nuclear weapons or supporting terrorism in the region.

Some analysts said that Trump's decision could send oil prices higher, which would impact companies' earnings.

Federal Reserve Chairman Jerome Powell was also in focus, who reportedly said early Tuesday at an event in Switzerland that emerging-market economies should be able to manage as advanced economies move toward tighter monetary policy.

On the economic front, the number of job openings increased to 6.6 million on the last business day of March, beating market consensus of 6.1 million, the U.S. Labor Department reported Tuesday.