Foul play has been ruled out as a cause in a boat blast that sent three people to hospital. There was an explosion on a boat moored in Oakville harbour Saturday. A 53 year old Oshawa woman was taken to hospital with serious but non-life threatening injuries, while her 56 year old husband suffered only minor injuries. There no word on the condition of a 45 year old man, also on the boat. Police and the Fire Marshall’s office are still trying to determine what caused the explosion.