A broken rail — which caused a service suspension on the Port Jefferson branch of the Long Island Rail Road between Port Jefferson and Stony Brook for most of the morning Wednesday — has been repaired and service restored, the railroad tweeted at 12:06 p.m.

The service suspension was first announced just after 7:30 a.m.

It was not immediately clear what caused the broken rail or how many trains were affected by the situation.

The railroad said residual delays of about 15 minutes were expected.

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