At least three bombs exploded at the office of Awami League (AL) at Demra in the city.
The incident took place after 10.00pm on Thursday, but no one was injured in the incident.
Confirming the matter, Officer-in-Charge of Demra Thana Md Shafikur Rahman said the investigation has begun and a process is underway to file a case.
Later, Awami League men brought out a procession in protest against the incident.
