Emergency personnel responded about 12:10 p.m. Thursday to a three-vehicle crash at the intersection of Route 3 and South Market Street in Waterloo.

One of the vehicles, a Dodge RAM, rolled over and came to rest in a field. The other vehicles were a red Ford Fusion and newer red Monroe County Highway Department Ford F150.

The Waterloo Police Department, Waterloo Fire Department and Monroe County EMS responded to the crash site. Route 3 traffic was diverted to South Market Street to the north and Park Street/Route 156 to the south.

Police said a Ford Fusion driven by Wilma Heller, 85, of Waterloo, was traveling north on Route 3 and continued through a red light, causing a collision with a Dodge RAM, owned by Second Sight Systems but driven by Maurice Thompson, 44, of Georgia, which was traveling east from Vandebrook Drive to South Market Street. This collision caused the Dodge RAM to strike the Monroe County Highway Department truck driven by Scott Scheibe, 55, of Waterloo, which was stationary at South Market Street for the light.

Heller and her 86-year-old male passenger, Robert Heller, were transported by ambulance to Red Bud Regional Hospital. Thompson was transported by ambulance to Mercy Hospital South in St. Louis County. Scheibe was transported by a friend to Red Bud Regional Hospital.