SAN FRANCISCO (AP) — San Francisco police are searching for as many as three men who were riding in a car involved in a road-rage shooting that killed a father and his son.

Police say Tony Bologna was driving home Sunday with his two sons when he was forced to stop in an intersection, blocking the path of another car.

Bologna backed up his vehicle to allow the other driver through.

But police say someone from that car fired shots at Bologna's car, killing him and his 20-year-old son, Michael. Tony Bologna's 16-year-old son, Matthew, is hospitalized in critical condition.