Three people were injured, one critically in a crash involving two vehicles on Tucson's northwest side.
The crash involved a GMC SUV and a Chevy Cobalt.
An baby in the backseat of the Cobalt who was not in a child safety seat was not injured, Capt. Adam Goldberg, a Northwest fire spokesman said.
The SUV was traveling southbound on North La Cholla Boulevard and crashed with the Cobalt, which was eastbound on Sunset Road and failed to yield from a stop sign, Deputy Tracy Suitt, a Pima County Sheriff's Department spokesman said in a a news release.
The 58-year-old driver of the Cobalt was taken to a trauma center with life-threatening injuries.
Crews from Northwest Fire District had to use the Jaws of Life to extricate the man from the car.
A 54-year-old passenger was also taken to a trauma center with injuries that were not considered life threatening.
Another passenger in the back seat was not injured.
The driver of the SUV had minor injuries and was treated at the scene, Goldberg said.
Charges against the driver of the Cobalt are pending, Suitt said.
Travel on north and southbound La Cholla Boulevard is restricted to one lane while Pima County sheriff's deputies investigate the crash.