A three-vehicle accident involving an ambulance in Tucson early Sunday left three people dead and six injured, according to Tucson Police.

Andres E. Hernandez, 20, of Tucson and Luis C. Sanchez, 25, were both pronounced dead at the scene. Sanchez had Douglas ties.

Another victim, 71-year-old male was not identified.

According to Tucson police, the accident occured around 4 a.m. when a Southwest Ambulance carrying the driver, a non-emergency patient, a medic and the 71-year-old man — who was a friend or relative of the patient — was traveling west on Grant in the median lane, which is the through lane under I-10.

A late-model silver Dodge Charger carrying four men — with Hernandez driving, Sanchez in the front passenger seat and two men riding in the back, also possibly in their early 20s — was traveling south on the frontage road that runs down the west side of the freeway.

The Charger ran into the ambulance, knocking it onto its passenger side. The Charger continued to slide until it hit a half-ton pickup truck that was stopped at a red light in the eastbound lane of Grant. An 18-year-old man was inside the pickup truck, which was jerked around 90 degrees by the impact so that it ended up facing south.

When everything came to rest, the Charger was against the driver’s side of the pickup truck and the ambulance was on its side, touching the back of the Charger.

Hernandez and Sanchez were dead at the scene, as was the 71-year-old man, who had been seat-belted into the front passenger seat of the ambulance.

The bodies of Hernandez and Sanchez had to be extricated from the Charger with special equipment.

The two other passengers in the Dodge Charger were injured, one with life-threatening injuries.

All six survivors of the crash were transported to a local hospital.

Though the pickup truck’s light was red, the ambulance’s light was not, according to a preliminary investigation. Allegedly, Hernandez appears to have run a red light, and witnesses as well as roadway evidence indicate he was speeding as well, according to reports.

Police are investigating whether Hernandez had been drinking. Alcohol does not appear to have been a potential factor for the ambulance driver or the pickup truck driver.

Accident information obtained from Arizona Daily Star.