Members of Rapid Action Battalion (Rab) have arrested five people, including prime accused Humayun, from Tongi area of Gazipur in a double murder case.
A team of Rab-1 arrested them from Ershadnagar in Tongi around 2 am on Thursday.
They also recovered some arms and drugs from the spot.
Akhtar Hossain, 35, and his cousin Ashiqur Rahman, 27, were hacked to death on December 12 last year at Dattapara in Gazipur city.
Of them, Akhtar returned home from the UAE a year before the murder while Ashiqur from Italy around six months ago.