The Rapid Action Battalion (RAB) on Saturday detained Jamalpur's Sadhurpara UP Chairman Mahmudul Alam Babu, who is allegedly involved in the killing of journalist Golam Rabbani Nadim, a district correspondent of Banglanews24.com.
Babu was detained at around 7am in Chilahati union of Debiganj upazila, Panchagarh.
On Friday, the Awami League suspended Babu from the party.
Bokshiganj upazila unit Awami League President Shahina Begum and General Secretary Ismail Hossain Talukdar Babul issued a letter in this regard on Friday.
Nadim was attacked on the night of June 14 in Bokshiganj and was brutally beaten by unidentified assailants.
Up to 15 people, allegedly led by UP Chairman Babu, attacked Nadim in the Paathaati Mor area when he was returning home on a motorbike after work.
He died of a severe brain hemorrhage on Thursday morning at Mymensingh Medical College Hospital.
Nadim was buried at his family graveyard in the Gomer Char village after two rounds of funeral prayers on Friday.
So far, 10 people have been arrested over the murder of the journalist. The arrestees are followers of Sadhurpara UP Chairman Mahmudul Alam Babu.