The investigation continues into a fatal marine incident in Lakeshore.
Provincial Police were called to Couture Beach around 2 p.m. Thursday and now say a personal watercraft was towing a tube which struck a steel breakwall.
A 17-year old girl from Essex County was pronounced dead in hospital, while a 16-year old girl was airlifted to a trauma centre in London where she remains with life-threatening injuries.
Two other teenage girls, a 15 and 17-year old were taken to hospital with non-life threatening injuries.
Police say no other details will be released at this time but ask any witnesses to come forward.