The Department of Narcotics Control has arrested two police constables along with 77 bottles of phensidyl in Kulaghat union's Tiktikir Bazar area in Lalmonirhat.
The arrestees are Harun-or-Rashid, 27, of Rajarbagh police lines and Mehedi Hasan, 25, of Rangpur police lines. They are residents of Panchagarh and Rangpur, respectively.
Acting on a tip-off, a team of the department conducted a drive early on Friday and arrested the duo with the phensidyl bottles, said Helal Uddin, an inspector at the DNC.
A car was also seized during the drive, but its driver managed to flee the area.
Later, the arrested constables were turned over to Lalmonirhat police after a case was filed against them, including the car driver.
Earshadul Alam, officer-in-charge of the police station, said a Lalmonirhat court had ordered the two constables to be sent to jail.