BRIARCLIFF MANOR - A driver is dead after a tractor-trailer and several cars collided on Route 9A in Briarcliff Manor Tuesday afternoon.

The fatal crash happened at around 4 p.m. near Pleasantville Road. A tractor-trailer driver heading northbound on Route 9A reportedly lost control of the vehicle and drove through a guard rail, striking two vehicles heading southbound.

The male driver of a red Acura was pronounced dead at the scene. Three others inside a Prius were taken to the hospital where they were treated for their injuries.

An accident reconstruction team is trying to determine what caused the tractor-trailer driver to lose control.

Hours after the crash, Route 9A and many surrounding roads remained closed as police continued their investigation.