A man was killed in Selden on Monday evening when his car collided with a Suffolk County Transit bus.

The Suffolk County Police Department said 20-year-old Zachary Rauso was driving south on Dare Road shortly before 6 p.m. when he crashed with the bus, which had been traveling in the opposite direction.

It was not immediately clear what caused the crash.

A physician assistant from the Office of the Suffolk County Medical Examiner pronounced Rauso, a Selden resident, dead at the scene.

The bus was carrying just one passenger at the time of the crash, police said. Both that passenger and the 52-year-old bus driver were treated for minor injuries at Stony Brook University Hospital.

Police impounded Rauso’s car, a 1999 Mercury, for a safety check, while the SCPD’s Highway Patrol Motor Carrier Safety Section inspected the bus and towed it away from the scene.

Detectives from the 6th Squad are investigating the collision, including its cause.

Anyone who witnessed the crash and has not yet been interviewed by police is asked to call the detectives at 631-854-8652.