Police arrested five Shibir men after they clashed with the former in Rajshahi city yesterday.
Around 100 activists of Islami Chhatra Shibir, student body of Jamaat-e-Islami, were taking preparation for bringing out a procession in New Market area in the afternoon to protest at the arrest of their Rajshahi University unit general secretary.
As police tried to stop them, the Shibir men hurled brick chips at the law enforcers and exploded around five crude bombs, triggering the clash, said Ziaur Rahman, officer-in-charge of Boalia Police Station.
Police then shot around 100 rounds of rubber bullets and lobbed several tear gas canisters to disperse the protesters, he added.
Police later nabbed the five Shibir men from the spot.
However, identities of the arrestees could not be known.
Members of Rapid Action Battalion-5 on Thursday arrested General Secretary of RU unit Shibir Saifuddin Yahia, who is wanted for several criminal charges, along with seven accomplices at a Shibir-run university admission coaching centre in the city.
They also seized firearms and explosives from the coaching centre.