OSAGE BEACH, Mo. (AP) — An East Moline, Illinois, man has died after being shocked when touching a dock ladder at the Lake of the Ozarks in Missouri.

21-year-old Marcus Colburn was swimming around 9 p.m. Monday at Wood Hollow Cove in the Osage arm of the lake. According to the Missouri Highway Patrol, Colburn attempted to get out of the water by grabbing the ladder when he was shocked. Authorities said the victim fell into the water face down.

Colburn was transported to the Lake Regional Hospital in Osage Beach where he was pronounced dead after 10 p.m.

According to authorities, a minor who was swimming with the victim was treated for minor injuries.

The Missouri Highway Patrol said the cause of Colburn’s death is under investigation.