Police arrested three activists of Jamaat-e-Islami from different places in Sundarganj upazila early Saturday in connection with the killing of Gaibandha-1 lawmaker Manjurul Islam Liton.
Identities of the arrestees could not be confirmed yet.
Atiar Rahman, officer in-charge of Sundarganj police station, said a team of police conducted raids at the houses of the trio at Shibram, Shobhaganj and Charkapashia villages in the upazila and arrested them in the dead of night.
Liton was shot at point blank range by some miscreants at his village home at Masterpara in Bamandanga union of Sundarganj Upazila on 31 December.
The MP was admitted to Rangpur Medical College Hospital where doctors declared him dead.