The Bangladesh Coast Guard recovered about 50,000 yaba pills from a sack floating in the Naf river beside Shahpori island in Teknaf, Cox's Bazar, after the crew of a wooden boat fled a patrol late on Wednesday night. The force put the value of the pills at about Tk 2.5 crore.

The Shahpori outpost moved on a tip-off at about 11pm, Coast Guard media officer Lieutenant Commander Sabbir Alam Sujan said on Thursday morning. Officers signalled a wooden engine boat near Nazirpara, on the river beside the island, to stop for a search. The people on board realised the Coast Guard was there and escaped, leaving the boat and the water behind them.

A search of the area then turned up a sack floating near the spot. Inside were bundles of yaba, the methamphetamine-and-caffeine tablet that dominates the cross-border drug trade in this part of the country. Coast Guard officers opened the wrapping on their boat and laid the blue packets out beside a sign recording the count for the official photograph released with the seizure.

Nobody was arrested. The Coast Guard did not name a suspect, did not say whether it had identified the owner of the abandoned boat, and did not say where the consignment was going. The media officer said the legal process for the seized pills was under way and that the force would keep patrolling the river.

The Naf is the border river between Bangladesh and Myanmar's Rakhine State, and the Teknaf stretch is the shortest crossing for yaba pressed in the hills on the other side. Small engine boats move at night, using the dark and the many channels of the river; the Coast Guard keeps outposts along the bank, including at Shahpori, to intercept them. Most runs end with a chase, an abandoned boat and a recovery from the water rather than an arrest, because the crews know the channels and the shoreline better than any patrol.

That pattern is what happened on Wednesday night. The seizure is large in value but thin in evidence: pills without people. Investigators will now have to work out who packed the sack, who was waiting for it and whether the boat can be traced to an owner or a landing point.

Coast Guard seizures on the Naf are reported regularly, and each one removes a consignment from a trade that feeds a market stretching from Teknaf to Dhaka. The force has said it treats the river route as a priority, and its media officer repeated on Thursday that operations would continue.

What remains open is the part that matters for any prosecution: whether a case will be filed, which agency will handle it, and whether the abandoned boat yields a name. The Coast Guard has not said. ScrollBeat will update this report when those details are released.