Clear Lake, Iowa (KELO-AM) — Four people were sent to the hospital and six others were hurt in a boating accident on Clear Lake. The accident happened at around 2 a.m. Sunday morning. Authorities say a boat operated by 28-year-old Andrew Nicholas, of Clear Lake, struck a public dock. Three of the four people sent to the hospital were treated and released. The condition of the other victim is unknown. The Iowa DNR and the Cerro Gordo County Sheriff’s office are investigating.