INDIANAPOLIS (WISH) — An Indiana state trooper is in serious condition after being struck by a vehicle on Interstate 65 near downtown Indianapolis on Saturday night.

The trooper was identified by Indiana State Police as Trooper Azariah Keith.

Around 8:45 p.m. Saturday, Keith was pulled over to help a pedestrian change a flat tire along the left side of I-65 southbound near 30th Street and Dr. Martin Luther King Jr. Street. Another trooper responded to block off the left lane and regulate traffic. Keith finished helping change the tire about half an hour later.

As he was putting his equipment back in his trunk, a 2018 Chevy Equinox approached the scene at a high rate of speed. State Police said in a release on Sunday that the Equinox “swerved around the trooper who was blocking the left lane, lost control, and crashed into the concrete median, struck (Keith), then (Keith’s) police car.”

Keith was immediately tended to by the other trooper until emergency services arrived. He was then taken to Eskenazi Hospital in critical condition.

Indiana State Police Sgt. John Perrine told News 8 that Keith suffered serious injuries, but he is expected to make a recovery.

The driver of the Equinox, 22-year-old Armaandeep Singh of Indianapolis, was arrested on a preliminary charge of driving while intoxicated and causing serious bodily injury.

Following field sobriety tests, Singh was taken to a hospital for a blood draw, and then to the Marion County jail. Police say the results of Singh’s blood test are pending.

Indiana State Police closed I-65 southbound lanes for nearly three hours during the investigation.