President of the Narayanganj Lawyers Association Sakhawat Hossain announced the siege plan at a rally in the city on Tuesday with no arrests yet in connection with the abductions and killings late last week.
After the sensational murders, RAB-11 commanding officer (CO) Lt Col Tarek Sayeed Mahmud was removed.
The elite force has also formed a four-member investigation team after Nazrul Islam’s father-in-law alleged city Councillor Nur Hossain had paid members of Rapid Action Battalion (RAB) Tk 60 million to carry out the operation.
The High Court on Monday also ordered the formation of a seven-member committee, led by an additional secretary of the public administration ministry, to probe the incident and the allegations.
The court also ordered that RAB be kept out of the investigations in view of the allegation against the force.
The main accused in the case, Nur Hossain, who is also the vice-president of Awami League’s Siddhirganj unit, is still absconding.