Police seized 837 bottles of phensidyl from a truck on Palashbari-Ghoraghat road at Kalugari in the district yesterday morning. Mojibar Rahman, officer-in-charge of Palashbari Police Station, said on secret information, a police team raided the area and recovered the phensidyl from the truck. They also seized the vehicle from the spot. However, the trucker and his helper managed to flee the scene, sensing the presence of the law enforcers.