UPDATE: 3 people confirmed dead in Rockwood collision Saturday night

It's been a deadly Thanksgiving weekend on the roads in southern Ontario, with at least seven people killed in traffic accidents.

The OPP have now confirmed three people died as a result of a two vehicle collision Saturday evening in the Guelph, Ont., area.

Sgt. Kerry Schmidt confirms the crash occurred on Wellington County road 44 near the community of Rockwood, just east of Guelph, around 8:30 p.m. and involved a sedan and pickup.

The OPP confirmed Sunday morning that among the three victims, was a 17 year old male.

All three victims were from the Township of Centre Wellington.

They say the driver of the second vehicle wasn't hurt. No other information about the accident was immediately released.

It was the third highway tragedy in southern Ontario in less than 24 hours, the other two happening east of Toronto.

On Sunday morning, a 28-year-old man was killed in a single vehicle collision in Oshawa, near Taunton and Thornton Roads.

Provincial police also reported early Saturday morning that an SUV crossed into oncoming traffic on Highway 7/12 near Port Perry and collided head-on with a car.

Three people in the car - a 59-year-old man and two women aged 55 and 44 - were killed, and a 41-year-old woman who was also in the vehicle suffered critical injuries. The 68-year-old man driving the SUV was being treated for serious injuries.

At the start of the long weekend Ontario Provincial Police warned that officers would be out in force looking for aggressive, distracted and impaired drivers, as well as seatbelt violators. 

- with files from Newstalk 1010