A 17-month-old girl has undergone a second operation to relieve pressure on her brain after a car plowed into her stroller early on Sunday afternoon.

The child received a life-threatening head injury when two cars collided at Harbour and Bay Streets shortly after noon on Sunday.

Police said a Toyota Corolla left the Gardiner Expressway at the Bay exit and was attempting to turn north when it collided with an eastbound Toyota Echo.

The Corolla mounted the northeast curb, where it struck the toddler in the stroller before coming to rest against a light pole.

Andrew Davies, 39, was walking his dog along Bay Street and saw the crash. Davies said the child’s mother was standing on the sidewalk at the northeast corner of the intersection when her child was hit.

The mother, Davies said, was “quite hysterical.”

Police haven’t filed any charges against either driver, but the collision is still under investigation.

The victim was taken to the Hospital for Sick Children in serious condition, according to Toronto EMS. Police said her condition hasn’t changed.