The market value of the seized yaba pills is around Tk90 lakh.
The law enforcers also seized a wooden boat – used to trespass into Bangladesh territory from Myanmar.
The arrested drug traders were identified as Nurul Amin, 50, Abdul Quddus, 40, Karim Mollah, 25, Omar Faruque, 22, and Sanam Ullah, 30. All of them are inhabitants of Shah Porir Dwip – located in Bangladesh at the mouth of the River Naf.
Tipped off, an operational team of Coast Guard's Saint Martin's station conducted the drive in the River Naf.
At around 1:35 pm, they saw a wooden boat crossing into Bangladesh from Myanmar. It tried to flee the scene seeing the speed boat of the law enforcers.
The Coast Guard team chased the boat and was able to seize it at one stage, said Lt Commander Amirul Islam of Coast Guard headquarters.
"While searching the boat, the coast guards detained five alleged drug traders along with 30,000 yaba pills," Amirul said.