Imphal, May 26: Unknown miscreants today set ablaze the office of District transport office, Thoubal at around 7.30 am. Report said that around 5/6 youths who looks around 20 to 30 years today came and set ablaze the office room and fled the area. Important documents and files along with some infrastructure of the Transport office had been destroyed in the arson. A team of Thoubal fire Service which rushed the area managed to extinguished the fire from spreading further.