The Iowa State Patrol says a person was fatally struck while helping the driver of an overturned semi, early Sunday morning.

It happened in the eastbound lanes of Interstate 80 near mile marker 209. A State Patrol crash report says around 1:30 a.m. a semi, driven by Destom Kidane, 37, Tyler, Texas, entered a ditch, then came back onto the road. That caused the vehicle to overturn, blocking part of the road and median.

Stanislow Gruszka, 43, Plainfield, Illinois, a passenger in a 2007 Mercedes-Benz R320, had gotten out of the vehicle to help the injured semi driver, Kidane.

As Gruszka returned to the Mercedes to dial 911, the Good Samaritan was struck by one of two other vehicles which collided, a 2017 Chevrolet Malibu driven by Gregg R. Vigna, 56, Plymouth, Michigan, and a 2005 Ford Freestyle driven by Donald Pirkl, 62, Victor, Iowa.

Gruszka, Kidane, and Vigna were all taken to University of Iowa Hospitals and Clinics by ambulance for treatment. The State Patrol said Gruszka's injuries were fatal.

The driver of the Mercedes, Jareck Mieczyslaw, 47, Burbank, Illinois, and Pirkl were not injured.

The crash remains under investigation.