Wall Street’s main indexes opened subdued on Monday as investors awaited Iran’s possible response to U.S. airstrikes on its nuclear facilities over the weekend, sparking fears of a broader conflict in the Middle East.

The Dow Jones Industrial Average fell 28.3 points, or 0.07%, at the open to 42178.55. The S&P 500 rose 1.8 points, or 0.03%, at the open to 5969.67​, while the Nasdaq Composite dropped 20.4 points, or 0.10%, to 19427.007 at the opening bell.

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(Reporting by Kanchana Chakravarty in Bengaluru; Editing by Pooja Desai)