The Morton County Sheriff's Department has just confirmed they're investigating the death of a man found in the Cannonball River near the former Dakota Access Pipeline site.

Authorities received the call around 11:30 Sunday morning. Authorities stayed on scene for about four hours.

A sergeant with the department says they're fairly confident police know who he is, but won't release his identity until they can contact his family.

Sheriff Kyle Kirchmeier will release more information tomorrow.