The identities of the deceased could not be known yet.
When some people were crossing the Naf river around 4 am, a patrol team of BGB asked the boatman to anchor it on the river bank, said Commanding officer of BGB-2 Lieutenant Colonel Foysal Hasan Khan.
Sensing danger, the criminals opened fire on the BGB men, forcing them to fire back self-defense.
After a brief gunfight, the BGB men rescued two people with bullet wounds while the others managed to flee the scene.
Later, they were taken to a local hospital where doctors declared them dead.
70,000 pieces of Yaba tablets and one gun were recovered from the spot.