KOHAT - Firing by a masked person outside a private educational institution created chaos in the area but the culprit fled after retaliatory firing of the security guard here on Tuesday. Police said that an unidentified culprit covering face opened heavy aerial firing outside a private school located in Chakar Kot area of Kohat creating panic among the students and staffers.  Retaliatory firing of the guard deployed for the security of the school forced the culprit to flee from the scene.