(Valparaiso, IN) - Indiana Conservation Officers are investigating the drowning of a man in a Valparaiso area lake on Monday.

At 6:17 p.m., conservation officers responded to Long Lake on a report of a person going in the water and not resurfacing, according to the Indiana Department of Natural Resources.

First responders from multiple agencies arrived on scene and initiated search operations.

Less than one hour later, firefighters in a boat recovered the body of Sean Ryan, 42, of Valparaiso.

Despite lifesaving efforts, Ryan was pronounced deceased at a local hospital.

Other assisting agencies included the Porter County Sheriff’s Office, Chesterton Fire Department, Portage Fire Department, Town of Porter Fire Department, Liberty Township Fire Department, Burns Harbor Fire Department, Northwest Health Emergency Medical Services, and the Porter County Coroner’s Office.