Police say a 24-year-old man was killed Monday in five-vehicle crash on the service road off of Exit 57 on the Long Island Expressway.

The accident, which involved a 2023 Mack garbage truck, happened just before 9 a.m., police say.

Police say the garbage truck, being driven by Jaswinder Singh, was traveling eastbound on Express Drive South when it rear-ended a 2019 Honda Accord that was stopped at a red light at the intersection of Motor Parkway. The truck then sideswiped a school bus, and then rear-ended a 2021 Jeep Grand Cherokee, police say.

They say the Jeep became lodged in the front of the garbage truck. The Jeep then struck a 2009 Toyota Matrix, causing the Toyota to spin into a utility pole.

Eyewitness Michael Hofmann, of Smithtown, rushed over to a Jeep that was hit to help the person inside.

"We ran over and got the woman out of the car," Hofman says. "She was pretty banged up."

Preet Singh, the manager of a gas station at the corner of where the crash happened, says the garbage truck hit the Jeep after it struck a white car that the 24-year-old man died in.

"It looks like he went airborne and hit the Jeep and hit that third car," Singh says.

The driver of the Honda Accord, Joseph Kelly, of West Islip, was pronounced dead at the scene, police say.

They say the drivers of the Jeep and Toyota were taken to the hospital with injuries not considered to be life-threatening.

A spokesperson for the New York City Department of Sanitation says the truck was new and the department had not yet taken possession of, and it was driven by a private vendor.

That driver was observed taking a sobriety test on the scene.

Police say no one on the school bus, which had three toddlers on it, was injured.

Singh, of Bellerose, was not injured. He was issued multiple summonses.

The truck and three vehicles were impounded for a safety check.