Three children, including a one-year-old, injured by gunfire at a Toronto birthday party

Multiple suspects are being sought

An outdoor birthday party for a one-year-old child in the Rexdale area of Toronto erupted in gunfire Saturday evening.

Police say four people were transported to hospital by emergency runs.

The victims are a 23-year-old man, a one-year-old boy, a five-year-old girl and an 11-year-old boy.

Police say the adult suffered a leg wound. Two of the kids were shot and the one-year-old was grazed by a bullet.

At the time they were taken to the hospital, paramedics said one child was in life-threatening condition.

Investigators are searching for multiple suspects. They say the suspects arrived on foot but may have fled in a vehicle.