(KMOV.com) -- Authorities are investigating a single-vehicle crash in St. Louis County Sunday night.
The accident happened around 9:30 p.m. near the on ramp at St. Charles Rock Rd. and northbound I-170.
Police and rescue units were called to the scene, though details on injuries were not immediately available.
The cause of the wreck was unknown.
Stay tuned to News 4 and KMOV.com for the latest information.