Emergency personnel responded about 5:25 p.m. Monday to a two-vehicle crash on Route 156 near Old Orchard Lane just west of Waterloo.

The vehicles involved were a white minivan and an Amazon delivery van.

Traffic was slowed in the area of the crash as crews tended to those involved.

Other responding agencies included the Monroe County Sheriff’s Department and Waterloo Fire Department.

Police said a 2019 Merz Sprinter van driven by John L. Davis, 28, of St. Louis for Amazon was stopped at the stop sign on Old Orchard Lane and pulled out onto Route 156 in front of a 2017 Buick Enclave driven by Aimee Dillenberger, 25, of Waterloo, which was traveling east on Route 156.

Davis was transported to Mercy Hospital South in St. Louis County by Monroe County EMS for treatment of unspecified injuries.

Dillenberger and two juvenile passengers in her vehicle were evaluated by Monroe County EMS and later transported to Missouri Baptist Medical Center in St. Louis by family.