CHICAGO (WLS) -- A Chicago police cruiser and an ambulance collided after responding to a call of a shooting on the West Side Saturday night.The police officers and paramedics were headed to a call of a shooting on West Flournoy when the crash occurred in the 3400 block of West Harrison at around 10:15 p.m. The ambulance flipped on its side.Two paramedics and two officers sustained injuries in the crash, but they're not believed to be life-threatening.