Miscreants stormed into the Sherpur district jail, allowing 500 inmates to flee.
A mob equipped with sticks and local weapons brought out a procession amid curfew in the afternoon.
At one stage, they stormed into the jail in Damdama-Kaliganj area of the city, breaking open the jail gate and setting fire.
Around 500 inmates managed to flee the jail.
The attack was carried out between 4:30pm to 5:30pm, said deputy commissioner of Sherpur district Abdullah Al Khairun.
Miscreants also torched different establishments and offices in the district.
They set the Sadar police station on fire at about 1:00pm.
DC quarter, New Market, Sadar ASP circle office, Zila Parishad, district election office, Sonali Bank, district Ansar-VDP office and other shops and establishments were also vandalised.