A Lalmonirhat court on Tuesday sentenced two members of banned militant outfit Ansarullah Bangla Team (ABT) to life term imprisonment and three others to 10 years imprisonment.
The lifers are Hasan Ali, 23, and Asmat Ali Laltu, 25, of the district.
The other convicts are-Safiul Alam Saddam, 22, Abu Nayeem, 25, and Ali Hossain, 20.
Lalmonirhat District and Session Judge Mizanur Rahman of Special Tribunal-1 delivered the sentence.
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The court also fined the five convicts Tk 5,000, in default, to serve in jail for another six months.
Lalmonirhat court police sub-inspector (SI) Musa Alam said a team from Rapid Action Battalion (Rab) -13 of Rangpur detained the five ABT men after conducting a drive at a house in Kaliganj upazila of Lalmonirhat on October 30 in 2018.
During the drive, the Rab members seized foreign pistols, magazines, firing pins, detonators and bullets from the militants' possession.
On the following day, a case was filed at the Kaliganj police station against the detainees.