MANDEVILLE - A 32-year-old from California died after a boat capsized in Lake Pontchartrain Monday afternoon.

The incident occurred around 3:30 p.m.  Hundreds, if not thousands of people, were on South Louisiana waterways for the Memorial Day holiday Monday.

The St. Tammany Parish Sheriff's Office and Wildlife and Fisheries are actively searching for the missing boater, authorities said just after 5 p.m. Monday. 

Around 8:30 p.m., WWLTV said the body of a man visiting from California was found near the Mandeville Lakefront.

Authorities said the boat capsized in the lake west of the cabins at Fontainebleau State Park.  The area is just east of the Causeway Bridge.

Six people were on the 31-foot twin inboard/outboard motorboat when it capsized.  Eyewitnesses reported seeing the boat flip and begin sinking.

Five people on the boat were rescued by good Samaritans quickly.  The 32-year-old man was unaccounted for until Monday evening.