Kailali, Sept 19 An unidentified group has torched a ward office of Dhangadhi Sub-Metropolitan City-8 on Wednesday night. Deputy Superintendent of Police at the District Police Office, Dashya Kumar Basnet said that the group set the ward office on fire by throwing a mineral water bottle filled with patrol at 10:00 pm. Police personnel brought the fire under control immediately. It is suspected that a group led by Netra Bikram Chand might have torched the ward office. Further investigation into the incident was underway, said police.