Border Guard Bangladesh (BGB) recovered 5.2 kilogrammes of “crystal meth” or “ice” from under the deck of a boat in the Naf River in Teknaf, Cox's Bazar.
The seized drug was being smuggled into the country from neighbouring Myanmar on Sunday.
In most cases, only the carriers are caught by the members of law enforcement agencies but their ringleaders remain out of reach, it said.
During the drive, no-one was arrested, as the smugglers jumped into the river and managed to escape.
According to BGB, two anti-smuggling patrol teams of BGB battalion Sadar and Nazirpara border post of Teknaf conducted an operation after receiving information about the ice smuggling.
Around 11:00 pm, two persons were spotted crossing the river on a wooden boat.
When the two teams asked the boat to stop, the duo jumped into the river and escaped.