ST. LOUIS COUNTY, Mo. (KMOV) -- Authorities responded to the scene of a five-vehicle wreck on Highway 40 in west St. Louis County on Monday.It happened on eastbound Highway 40 at Mason Rd. around 1:50 p.m.No injuries were reported.
Traffic on Highway 40 was at a standstill while crews worked to clean up the scene. All lanes have since reopened.The cause of the wreck was not immediately clear.