Authorities in east-central Illinois say a 72-year-old man drowned after falling out of his boat at the start of a weekend fishing tournament.

Vermilion County Coroner Peggy Johnson says Kenneth Dunbar of Danville was pronounced dead Saturday morning after he fell into Lake Vermilion.

The coroner's office says Dunbar had just left the boat ramp to participate in the Illini Bass Club tournament when he fell out of the boat.

Johnson says an autopsy on Sunday determined that Dunbar drowned, but she says he had severe heart problems that are believed to have contributed to the accident.