Shortly before 3 am on Thursday, Norwich Fire Department answered a call and discovered three of the Norwich police cruisers were on fire. Fire investigators and the VT Department of Public Safety investigated the incident at the request of the Norwich Police Chief. Investigators determined the fire to be of unexplained origin but they do not consider it suspicious. State arson investigators said, it is a possibly that a mechanical issue started a fire in one car and then caught the rest of the cars on fire. Loss of the three vehicles is estimated at $100,000. Hartford Vt. and the Windsor County Sheriff Department are allowing Norwich to use a cruiser from each of the departments.