Jefferson County, MO (KSDK) - A 39-year-old St. Louis man disappeared Friday afternoon while swimming in the Meramec River.
Firefighters from the Mehlville Fire and Ambulance District were called out to the river near Tesson Ferry and Highway 21 to help search for the man.
Authorities were told the man, whose name has not been released, was swimming in the river with girlfriend around 5:30 p.m. when he went under and didn't resurface.
The Jefferson County Sheriff's Department is handling the investigation in conjunction with the Missouri Water Patrol.
The search stopped for a period of time Friday evening due to jurisdictional issues. Authorities from St. Louis County were initially conducting the search, but left the area after it was determined Jefferson County had jurisdiction.