They also demanded the immediate arrest and punishment of Mirza.
However, ruling party men had to conclude the press conference half way through due to police intervention amid the ongoing lockdown.
Earlier on Friday around 10:15pm, a gang of miscreants hurled five bombs at the village home of Obaidul Quader in Campaniganj. Of these, two exploded.
Police arrested a man for interrogation in this connection.
Mirza and his rival Mizanur Rahman Badal, the organising secretary of upazila AL, blamed each other for the bomb attack.
Hours before the attack, Mirza on Friday afternoon on a Facebook live post announced that he and the people of Campaniganj would not let Obaidul Quader come to the upazila because the latter did not initiate any development work in his own electoral constituency despite being a minister.