A good Samaritan who stopped to help the victim of a crash along a highway in Arizona was struck and killed by a vehicle, authorities said Sunday.

Two concerned citizens had stopped to render aid just before 4 a.m. in the eastbound lanes of State Route 202 near Phoenix when the deadly crash occurred, the Arizona Department of Public Safety (DPS) said.

“This is an absolute tragedy,” DPS Sgt. Eric Andrews told FOX10 Phoenix at the crash scene. “This is the worst-case scenario where someone who was completely uninvolved is stopping to help those that they saw were in need and ended up being the victim themself.”

Andrews said another vehicle crashed into the good Samaritan’s car and pushed it into one of the individuals, who later died at a hospital, KNXV-TV reported.

The driver that initially struck the vehicle that led the good Samaritans to stop and help had been involved in an earlier hit-and-run on I-17 near Durango Road, according to DPS.

Four vehicles were reportedly involved in the collision on 202.

Two other drivers were transported to the hospital with serious injuries.

A 5-month-old infant was hospitalized in stable condition following the first collision, according to local reports.

Troopers said impairment is being examined as a possible factor, though the investigation remains ongoing.

The accident temporarily closed the eastbound lanes until later Sunday morning.