Police arrested seven activists of Islami Chhatra Shibir from Char Kaliganj at Bonnakandi village in Sirajganj's Ullapara upazila early yesterday.
They also seized six crude bombs from their possession, said Officer in Charge of Ullapara Police Station Dewan Koushik Ahmed.
The arrestees are Masud Rana, 21, secretary of Sirajganj district unit of Shibir, and activists Shariful Islam, 35, Shahin Alam, 20, Russel Rana, 20, Rahul Rana, 18, Ali, 19, and Md Alamgir Hossain, 45.
On information, police raided the area and arrested the Shibir men with the bombs when they were holding a clandestine meeting there to commit crime, said the OC.
The arrestees were later produced before a court that sent them to jail, said the police official.