An ambulance carrying a patient crashed head-on with another vehicle in Pasadena, California, on Saturday, leaving the patient dead and three other people injured, police said.
The collision took place about 4 p.m. on Fair Oaks Avenue near Mountain Street, officials with the Pasadena Police Department said.
The ambulance patient went into cardiac arrest and died at the hospital.
Prior to the crash, the patient, a man in his 70s, did not have life-threatening injuries and was being taken to the hospital for a medical appointment, Pasadena police Lt. Jesse Carrillo said.
The ambulance driver and a passenger were hospitalized in serious condition, Carrillo said. A woman driving the other vehicle, a Jaguar, suffered a broken ankle.
The cause of the crash was under investigation. The ambulance did not have its lights or siren on when the collision occurred, police said.
Drivers were advised to avoid Fair Oaks Avenue between Hammond and Mountain streets as police investigated.
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