OPP are investigating a suspicious barn farn in Otonabee South Monaghan early Monday. Frefighters from 4 stations responded to the call around 2 a.m. on Greenwood Road near Stewart Hall, at a property owned by the Peterborough Airport. This is the second fire at this location in a week and a half. In both cases, the structures were in the process of being demolished. The Fire Marshal's Office and OPP are on scene.