The arrestees were identified as Lovely Akhter (30), daughter of Shah Alam of the area and sister of Sohel Rana, vice-president of central Chhatra League unit; Alamgir Hossain (30), son of Taherul Islam, and Jewel Rana (32), son of Mozammel Haque of Sahadar village.
Sohel Rana confirmed to UNB that Lovely Akhter is his elder sister.
Abdul Mannan, officer-in-charge of Ranisankail Police Station, said Lovely Akhter had been involved in drug peddling in the municipality for long.
Acting on a tip-off, police conducted the drive and arrested them with 21 pieces of yaba pills around 10:30pm.
The OC said there are several cases against her with the police station. Two more cases have now been filed in light of the latest incident. The accused were sent to jail after being produced before the court, the OC added.