Perpetrators torched an office of Awami League in Sorui area of Bagerhat district town in the early hours of Saturday.
Shahadat Hossain, additional superintendent of Bagerhat Sadar circle police, said that miscreants set fire to the AL office of ward no-4.
After being informed, a fire-fighting unit doused the fire, UNB reports.
Police visited the spot in the morning and said they are working to catch the perpetrators.