Four people died after a suspect in a police chase drove the wrong way and caused a head-on crash on Interstate 10 near Mobile, Alabama on Monday afternoon.

The Baldwin County, Alabama Sheriff’s Office said the police chase began after a deputy tried to make a traffic stop on I-10 eastbound near the Loxley exit.

Deputies said the suspect refused to stop, but got off at the Wilcox exit, turned around, and entered I-10 westbound.

After driving westbound for one mile, the suspect vehicle made a U-turn and began driving the wrong direction in the westbound lanes, hitting another vehicle head-on. 

The sheriff’s office says after the initial impact, the suspect vehicle rolled over the guard rail and caught fire. 

Deputies confirmed three people inside the suspect vehicle died, and one passenger in the car that was hit died.

The driver of the car that was hit was airlifted to University Hospital in Mobile for treatment. 

The sheriff’s office says both vehicles involved in the crash had out of state license plates. 

A witness, Sierra Davis, told reporters she saw the police chase while she was driving to work on I-10, and said the car officers were chasing forced her off the road.

“He was trying to go around me, so I tried to get over a little bit. He went through the cars, and I like had to swerve off the road. I was in the parking lot, on the phone with my mom telling her what happened, and I saw smoke literally right on the other side of the trees where the interstate is.”

The westbound lanes of I-10 were closed for several hours as the fire was extinguished and the crash scene was cleared.

The Alabama Law Enforcement Agency is investigating the crash as a traffic homicide.