The Rapid Action Battalion (Rab-4) seized fake revenue stamps worth about Tk 8.5 crore in the city on Sunday night and arrested two traders.
Meanwhile, another team of Rab-10 seized 1500 bottles of phensidyl from an onion-laden truck in the city early Monday and arrested the truck driver.
The fake stamp traders have been identified as Abdul Khaleque, 52, of Jamira Lota, and Ohidul Islam, 30, of Charpata under Bhola district, while the truck driver as Abul Hossain alias Khokon, 40.
Rab-4 officials said they raided the house of Khaleque and Ohidul at Paikpara in Mirpur and seized the fake stamps at about 6:00pm.
During the preliminary interrogation, they said the fake revenue stamps were supplied to them by one of their partners, and they supplied the stamps to different garment factories and other offices.
Rab officials said they were hunting for others involved in illegal trading.
Acting on a tip-off, Rab-10 officials intercepted the onion-laden truck at Elephant Road under New Market Police Station at about 1:45am and recovered the bottles of phensidyl.
They arrested the truck driver for carrying the contraband item in his vehicle.