Decetive Branch of Police arrested seven youths from different parts of the capital on Sunday night in connection with the killing of Aminul Islam Jisan.
The detectives also recovered the mobile phone, used by the victim, from the possession of the arrestees.
The arrested were identified as Mehedi Hasan, Sharif Hossain, Md Imon, Md Hasan Ahmed and Md Asif Iqbal alias Anik, Md Amit Hasan and Md Wasif Ullah alias Gourav.
A gang of unidentified miscreants beat Jisan with iron rods on the bank of Dhanmondi 32 lake in the evening on May 12.
He was taken to Bangladesh Medical College Hospital in Dhanmondi from where he was shifted to Dhaka Medical College Hospital. He, however, succumbed to his injuries at the DMCH on May 14.
A case was filed with Dhanmondi police station the following day and later it was transferred to Detective Branch of Dhaka Metropolitan Police.
DB sources said a special DB team, led by its senior assistant commissioner Md Nur Alam Siddique, conducted drives in different areas of the capital on Sunday and arrested the seven suspected killers. During preliminary interrogation, the arrestees confessed to their involvement in the a murder.
