The traders were returning to their neighbourhood after buying vegetables from the wholesale market in Manikganj’s Jaagir.
RAB officials say the dead were members of a local gang of robbers called ‘Sagor Shoikot’.
RAB-8 officer Major Adnan Kabir said the shootout occurred near the Katlarkhal area in eastern Sundarbans on Thursday morning.
However, they could not provide details to the reporters.