The Peterborough County OPP and the Peterborough Police Service responded to the call of a possible threat at a local high school Tuesday afternoon. They say Crestwood Secondary School and then James Strath Public School were put in lockdown and then evacuated around 2 p.m. A 16-year old boy was taken into police custody for questioning. He was later released without charges. Anyone with information that could help the investigation is asked to call Crimestoppers.