Illinois State Police investigate a crash that left seven people dead, including children, on Interstate 90 near Anthony Road south of Marengo Sunday morning. | Photo: Captured News

Five children and two adults died after a van traveling the wrong way struck another vehicle head-on and burst into flames on Interstate 90 in McHenry County.

Illinois State Police District 15 troopers responded around 2:11 a.m. Sunday to Interstate 90 near mile marker 33.5, which is west of Route 23 between Marengo and Hampshire.

The Hampshire Fire Protection District, Marengo Fire and Rescue Districts and other departments were called to the scene.

Illinois State Police investigate a crash that left seven people dead, including children, on Interstate 90 near Anthony Road south of Marengo Sunday morning. | Photo: Captured News

A spokesperson for the state police said the incident involved two vehicles, a van and a passenger vehicle, in the westbound lanes.

The van struck a passenger vehicle head-on. Both vehicles became fully engulfed in flames.

A medical helicopter landed on the interstate at the crash scene.

One person was airlifted to a local area hospital with severe injuries, the police spokesperson said.

Illinois State Police investigate a crash that left seven people dead, including children, on Interstate 90 near Anthony Road south of Marengo Sunday morning. | Photo: Captured News

Seven people were killed in the crash.

[Suggested Article]  40-year-old woman killed after crashing car into mailbox, tree near McHenry

The deceased include five children and an adult female who were all in the van, and an adult female who was in the passenger vehicle.

All westbound lanes of Interstate 90 near milepost 33 remain closed for an investigation. Traffic is being diverted off at Anthony Road.

The cause of the crash was not immediately known.

EDITOR’S NOTE: An earlier version of this story indicated that the van was at fault in the crash. Police now say the sedan was at fault.