Durham Regional Police say a 43-year-old Richmond Hill woman is dead and her three-year-old daughter is in critical condition after they were involved in a collision in Oshawa.
Police say the two were passengers in an SUV that collided with a Jeep Cherokee and a car on Saturday just after 10 p.m.
Investigators say witnesses told them the SUV drifted across the road and sidewiped a car before spinning into the path of the Jeep.
Police say the woman died of her injuries in a local hospital while her daughter, who had been strapped into a rear car seat, was transported to Sick Kids Hospital in Toronto in critical condition.
Police say the driver of the SUV was arrested at the scene for impaired driving.
They say the people in the other vehicles sustained only minor injuries.