TORONTO - At least five people died during the weekend on lakes and rivers in Ontario while at least three others were injured in water-related mishaps.

The dead include Christopher Alkerton, 18, of Niagara Falls, Ont., who drowned Sunday at Rock Point provincial park on Lake Erie.

Ontario Provincial Police say Alkerton was just a short distance from shore when he disappeared below the surface.

His friends and others swimmers in the area tried to locate Alkerton, but were unsuccessful.

Police searched the area with a helicopter and police boat until finding the man's body on the bottom of the lake.

A post mortem examination is to be conducted Monday to determine the exact cause of death, which police say is presumed to be drowning.

Two men died of apparent drownings on Saturday, including Bun Chang Tang, 31, or Toronto at Wasaga Beach. He was rushed to Collingwood General and Marine Hospital, but did not survive.

A post-mortem is scheduled to be performed on Tang's body today.

In Gravenhurst, an 84-year-old man identified as George Herczeg went swimming in Lake Muskoka on Saturday afternoon but did not return.

Police later found his body in shallow water near a dock.

One death was caused by a boating accident on Chemong lake near Peterborough, Ont., on Sunday.

Paul Heffernan, 54, of Innismore, Ont., died after he was thrown from a boat after crashing into two docks and several other boats. A female passenger was also thrown from the boat but her injuries were minor.

Provincial police, meanwhile, have released the name of the Perth, Ont., man who died when jumping off a cliff into Otty Lake on Saturday.

Police say the body of Michel Daoust, 26, was recovered by a dive team and an autopsy is expected to be performed this week.

In the Niagara region Saturday, a boy was pulled from a motel pool around 9:45 p.m. He was transferred to Buffalo Children's Hospital in critical condition. Police had not yet released the boy's age or hometown.

In Ajax, Ont., an 18-month old baby was pulled from a pond early Sunday and rushed to Sick Kids Hospital in Toronto.

Durham region police have not yet identified the child, or its gender, or commented on the circumstances surrounding the incident.

On Sunday, a man suffered deep cuts to his leg from a propeller after falling out of a boat on the Ottawa River and being run over by the vessel.

The man, reported to be in his 20s, was believed to be in stable condition.