MESA, Ariz. -- Investigators believe impairment and speed were factors in an early morning crash that killed two people Monday morning.
It happened at about 5:15 a.m. at Brown and Recker roads in Mesa.
Video from the scene showed three mangled vehicles, one of them on its roof. Aerial video from Chopper 3 showed a huge debris field in the intersection.
Investigators believe a woman driving a gray Toyota FJ Cruiser was speeding when she rear-ended a Chevy Malibu that was stopped at a red light. The impact pushed the Malibu into a black SUV that also was stopped. The SUV rolled over. Police say a fourth vehicle was involved, but only peripherally.
The Malibu driver, identified as Guadalupe Madril, 37, and front-seat passenger Jason Aguilera, 33, were pronounced dead at the scene.
A witness named Matt pulled a 60-year-old man from the rolled SUV. That victim received injuries that were not life-threatening.
The 35-year-old woman who was driving the FJ Cruiser, the least damaged of the three vehicles, suffered only minor injuries. Witnesses said she was doing cartwheels and pushups in the street.
"She skipped right out of there, did some somersaults, very active young lady," Matt said.
Detectives believe the woman may have been impaired. She was taken to a local hospital where she remains under guard by patrol officers. Police are waiting for toxicology results and have not made any arrests at this point.
"In any fatal accident, we look for signs of impairment in any of the drivers," Sgt. Sean Kelly of the Mesa Police Department explained. "The driver of the Toyota we're looking at for possible impairment."
The investigation is ongoing, but Sgt. Tony Landato said speed and impairment appear to be the contributing factors in this collision.
Family members on the scene were visibly upset as officers kept them outside the yellow crime-scene tape.
Witnesses told 3TV's Heidi Goitia that the wreck happened very quickly and it sounded like an explosion.
"It sounded like an atomic bomb went off. ... The noise was just horrendous," Christopher Piton said. "I've seen some pretty crazy accidents on this street right, but it was horrible."