Authorities say a Pleasant Hill man who fell from a boat on a city lake over the weekend drowned.

Television station KSHB reports that the incident happened around 11 a.m. Sunday in Cass County.

The Missouri State Highway Patrol says 67-year-old Michael L. Hamilton of Pleasant Hill, fell from a 1981 Monark boat he was aboard into Pleasant Hill City Lake, located just southeast of Kansas City (east of Avon).

Investigators say bystanders tried to rescue the man and eventually pulled him from the water, but too late to save him.

Hamilton was pronounced dead at the scene at 11:31 a.m. by Pleasant Hill Fire Paramedic Amy Doran. Investigators say he was not wearing a life jacket.

Pleasant Hill Police assisted the three Troopers on scene.

Hamilton's boat was transported back to his residence by the Patrol.