Police say a man was killed when a vehicle he was driving struck a tractor-trailer early Monday on the Long Island Expressway in Hauppauge.

According to police, Brian Nieves was driving a 2018 Jeep Grand Cherokee in the middle lane of the westbound LIE near Exit 56 at approximately 3:15 a.m. when the Jeep struck the rear of a 2012 Peterbilt tractor-trailer, driven by Rafael Mercado.

Nieves, 38, of Bay Shore, who was alone in his vehicle, was ejected from the vehicle and pronounced dead at the scene.

Mercado, 55, of Medford, who was also alone in his vehicle, was not injured. The Jeep was impounded for a safety check.

Suffolk County Police Motor Carrier Section officers conducted a safety check on the tractor-trailer at the scene.

The crash closed down a stretch of all westbound lanes for hours. All lanes have since reopened.

Detectives are asking anyone with information on this crash to call the Fourth Squad at 631-854-8452.