Three dead in single-car crash in Alliston, Ontario ALLISTON, Ontario, Jan. 13 (UPI) -- Police are investigating a single-vehicle crash in Alliston, Ontario, Sunday morning that resulted in the deaths of three people, officials said. The accident happened around 8 a.m., the Toronto Star reported. Ontario Provincial Police were investigating the incident. They have not yet said what caused the crash. No other details on the incident were available.