Route 156 was closed during the early morning hours just west of Waterloo for accident reconstruction following a two-vehicle crash with serious injuries.

The collision, which involved a pickup truck and a car, occurred about 2 a.m. Sunday west of Wetzel Lane near the Monroe County Fairgrounds.

A preliminary Illinois State Police report states that a white 2016 Dodge Ram driven by Steven J. Allard, 19, of Waterloo, which was traveling east on Route 156, crossed the center line and struck a gold 2014 Chevrolet Malibu driven by Heather E. Wild, 31, of Valmeyer, which was traveling west on Route 156.

Responding agencies included Waterloo police and fire, the Monroe County Sheriff’s Department, Monroe County EMS, Valmeyer Fire Department and Illinois State Police.

An ARCH Air Medical Services helicopter responded to the scene and Wild was airlifted to a St. Louis hospital with serious injuries.

Allard was transported by ambulance to an area hospital for treatment of unspecified injuries.

ISP is still investigating the crash. Check for more information as it becomes available.