A 66-year-old man died at the scene of a serious two-vehicle crash on Highway 416 at West Hunt Club Road early Tuesday morning, paramedics say.

Highway 416 fatal crash West Hunt Club Road truck scene

A pick-up truck and a small vehicle were involved in the crash, which shut down Highway 416 southbound early Tuesday morning. (Pascal Charlebois/CBC)

The crash happened at 7:45 a.m. and involved a small car and a pick-up truck. Ontario Provincial Police are investigating.

OPP Insp. Dave Springer said investigators believe the truck, which had been heading north, crossed the median while pulling a U-turn and struck the small car heading south.

A team of four Ottawa paramedics en route to a training exercise witnessed the crash and stopped to respond.

The man who was driving the pick-up truck had no vital signs. Paramedics tried to resuscitate him but he was soon declared dead at the scene.

He has been identified as 66-year-old Daniel Potvin of Spencerville, Ont.

Another person — a 38-year-old woman — was trapped in the driver's seat of the small car and had to be extricated by firefighters. She suffered head trauma and a broken leg.

An air ambulance landed on the highway to take the woman to The Ottawa Hospital's Civic campus trauma unit. OPP said she is listed in critical, but stable condition.

Highway 416 fatal crash Dec. 10 West Hunt Club Road

An air ambulance was dispatched to the scene and landed on the highway early Tuesday morning. (Julie Cates/Twitter)

There were no other patients, paramedics said.

Ontario Provincial Police are investigating.

Highway 416 southbound was closed at Hunt Club Road, but has since re-opened.