The arrestees are prime suspect Md Saif, and his associates--Monir, Arafat, Saiful, Meherab, Appel, Sifat and Sohel.
The detectives also recovered one sluice gear from Saif’s possession.
Masudur Rahman, deputy commissioner (media) of DMP, said a team of DB (North division) conducted special drives in Uttara and Dakkhin Khan areas and arrested them.
Briefing reporters at DMP Media Centre on Sunday, DC (Media) Masudur Rahman said that during preliminary interrogation, the arrestees revealed that two rival groups—Shanta Group and Arafat Group--used to lock in altercation and clash due to various reasons, including establishing supremacy in Nogria Bari area of Dakkhin Khan Chairman Bari.
17-year-old boy Mehedi, hailing from Patuakhali, was murdered following the incidents, he said.
Teenaged groups of the area like Jim-Jiad group, Shanta Group, Arafat Group Kamal Group and Ansar Group are very much active in the area and they are involved in various crimes, including eve teasing, extortion, mugging and murder, the DC (Media) said.
Victim Mehedi, came to visit his friend’s residence in Dakkhin Khan area and they locked into an altercation with some local adolescents over a trifling matter.
Later, Mehedi was beaten dead during the clash over the issue on August 31.