TORONTO - A year after shots fired at a car killed a 33-year-old pregnant woman, Toronto police are offering a reward of up to $50,000 for information leading to the conviction of those responsible.

Candice Rochelle Bobb, of Mississauga, Ont., was in a vehicle with three other people returning from a basketball game when the gunfire erupted in a northwest Toronto neighbourhood on May 15, 2016.

Bobb, who was sitting in the back seat, died in hospital and her infant son was delivered by emergency C-section at 24 weeks, but died roughly a month later.

Police have said anyone who is charged in Bobb's shooting will also be charged in the death of the baby.

Det.-Sgt. Mike Carbone told a news conference on Wednesday that investigators do not believe Bobb was targeted, but that "something in the movement" of the car before the shooting could have caused the vehicle to be targeted.

Bobb's mother, Jackie Weir, said her daughter was the life of the family and appealed to the public for any information that could help solve the homicides.