A two-car collision in Azusa left four people critically injured and three with minor injuries. Kristine Rosas, 18, and her unidentified male passenger were critically injured when the westbound auto she was driving collided with an eastbound car on Sierra Madre Avenue near San Gabriel Canyon Road, Sgt. Jim Glancy of the Azusa Police Department said. Two occupants of the eastbound car were also critically injured, and three received minor injuries, he said. Four females and one male, all from La Verne, were in the second car. None were immediately identified.