An unresponsive man was pulled from a lake near Willmar, Minn., and declared dead after bystanders and emergency personnel tried to revive him, authorities said.

The death occurred Sunday at the Eagle Lake boat access in Dovre Township, the Kandiyohi County Sheriff’s Office said.

The man was identified as David Klucas, 58, of Willmar. An official cause of death has not been released.

Bystanders tried to revive Klucas before medical responders took over, the Sheriff’s Office said.