Police say shortly before 2 p.m. Saturday, emergency crews were called to Port Burwell Provincial Park for a report of a missing swimmer and three near-drownings in Lake Erie.
It was determined that two people were swimming in Lake Erie when both became in distress. Two other people went into the water to help, but also became in distress.
A Good Samaritan saw what was happening and threw a life-saving ring that was on the beach, which police say saved three people.
The fourth person remains outstanding and a search for the person is ongoing.