Suffolk County police are investigating a serious crash on the Long Island Expressway that left a man dead and closed the roadway in both directions near Exit 53 on Saturday morning.

Suffolk County police said the driver of a 2012 Cadillac, Sergio Vargas, 28, of Queens, rear-ended a tractor trailer, causing the semi to overturn. Vargas was pronounced dead at the scene and a passenger in the car, Sasha Adams, 28, of Bellport, was critically injured and airlifted to Stony Brook University Hospital.

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The expressway was shut just after the crash, near the entrance to the Sagtikos Parkway, at 5:13 a.m.

The truck driver, Juan Arroyave-Garcia, 37, of Englewood, New Jersey, suffered minor injuries, police said.

The roadway was reopened at 11:06 a.m., police said.

With John Asbury