Ontario Provincial Police are investigating the deaths of four people at a home near Harrow. Officers were called to a residence on County Road 13 around 1:30 p.m. Investigators believe there is no imminent threat to public safety, although the OPP reminds all members of the public to be aware of their personal safety at all times. OPP on the scene of a sudden death investigation at a home on County Road 13 in Harrow, Ont., on Thursday. Harrow is a small southwestern Ontario town near Lake Erie.