Two westbound lanes of the Long Island Expressway in Old Westbury have been shut down due to a truck fire, Nassau police said in an advisory.

The truck had caught on fire, but the blaze has been put out and a tow truck was trying to help clear the scene at 10:15 p.m., according to the Old Westbury Village police, who responded to the fire.

A Federal Express truck was engulfed by flames, said Westbury Fire Department Chief Doug Ingram. He said the blaze was put out by about 30 firefighters.

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The truck fire, which started about 9 p.m., shut down the westbound center and right lanes between exits 39 and 40, authorities said.

The cause of the fire and other details were not immediately available Monday night.