A 43-year-old Richmond Hill woman is dead, her three-year-old daughter is in critical condition and her husband is facing impaired driving charges after a collision in Oshawa late Saturday night.

Police say that the victims were occupants in a grey SUV that was headed westbound on Raglan Road near Thornton Road at around 10:20 p.m. when it crossed a median and sideswiped a Toyota Corolla, spinning into the path of a Jeep Cherokee that was travelling behind the Corolla.

The woman was without vital signs at the scene and was later pronounced dead in hospital. Her three-year-old child, who was in the rear passenger seat, sustained critical injuries and was rushed to The Hospital for Sick Children for treatment.

All other drivers and occupants of the involved vehicles sustained minor injuries.

One witness who came upon the scene moments after the collision told CP24 on Sunday morning that it appeared as though the toddler was breathing at the scene but was in grave condition.

She said that another person helped stabilize her neck until paramedics arrived.

“She had a faint pulse but we weren’t sure whether to do CPR or not because we didn’t want to make anything worse,” Gillian Bickerton said.

Police say that the driver of the SUV was arrested at the scene on suspicion of impaired operation of a motor vehicle. He has subsequently been identified as 43-year-old Kin Lai.

Raglan Road was closed for several hours as police investigated at the scene, though it reopened at around 6:30 a.m.

Police say that they are interested in speaking with anyone who witnessed the accident or who may have information regarding what happened.