Three people are dead and two are seriously injured after an overnight collision near Port Perry, Ontario Provincial Police say.

According to Sgt. Kerry Schmidt, an SUV was travelling northbound on Highway 7/12 when it crossed into the southbound lanes and collided with a car at Scugog Line 4 just after 1 a.m.

Schmidt says that the 59-year-old male driver of the car and two female passengers, ages 55 and 44, were both pronounced dead at the scene while the fourth occupant was taken to hospital with critical injuries.

The 68-year-old driver of the SUV, meanwhile, was taken to hospital with serious injuries.

Friends confirmed to CTV News Toronto Saturday that Walter Rose and Wendy Ho, a husband and wife, were two of those killed in the crash.

“We are certainly looking at all factors right now. We don’t have any final answers,” Schmidt told CP24. “Speed, alcohol, drugs, distraction, all those factors will be things we will be looking into see whether they contributed to this collision at all. “

Schmidt said that it doesn’t appear as though road conditions played any factor in the collision, as visibility and traction were both fine at the time.

He said that police have spoken to some witnesses already and are currently with the injured parties in hospital as they continue their investigation.

“Just a heartbreaking tragedy here,” he said.

The highway was closed in both directions overnight as police conducted an investigation at the scene but reopened at around 9:30 a.m.