ELK POINT, S.D. (AP) — Authorities say they are searching for a 19-year-old man who went missing while swimming with friends in the Missouri River in southeastern South Dakota.

The Union County Sheriff's Office says the man went missing around 3 p.m. Sunday near Elk Point. Authorities assisting in the search included crews from South Dakota and Nebraska.

The man's name was not released pending notification of his family.

Copyright 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

More From KXRB