Boulder City, Nevada - National Park Service Rangers are searching for a Henderson man who was boating on Lake Mead August 10.

The Lake Mead National Recreation Area Interagency Communications Center received multiple calls between 5 and 5:30 p.m. August 10 reporting an unoccupied vessel floating in the Virgin Basin of Lake Mead.

Rangers responded to the scene and located the vessel. No one was on board. The National Park Service began an immediate search on the water. One helicopter from Arizona Department of Public Safety and two helicopters from the U.S. Air Force 66th Rescue Squadron also assisted with the search August 10. The search resumed today with support from the Nevada Army National Guard.

Through the investigation, rangers have learned that the victim launched his boat around 4 a.m. August 10 at Callville Bay. His vessel was located 13 hours later. The search area is about 20-25 square miles.

The incident is under investigation.