TULSA — Police are trying to figure out how a man ended up dead Monday morning at a reservoir near 193rd East Avenue and 21st Street.

A witness reported seeing a fisherman, then only fishing gear and a hat on the shoreline around 8:30am.

An hour later, police discovered the body.

Investigators on the scene tell FOX23 that the bank is very steep and slippery. They are working to see if he slipped in.

A medical examiner was called to the scene to determine the exact cause of death.

Investigators are working to notify the victim’s family before releasing the identity.