The identities of the deceased could not be known yet.
In Narayanganj, police recovered the bodies of four young men from Panchrukhi area, said MA Haque, officer-in-charge of Araihazar Police Station.
Locals spotted the bodies around 6am and informed police.
Later, police recovered the bodies and sent those to Narayanganj General Hospital for autopsy, said the OC.
The victims bore same type of injuries on their heads.
It was not clear whether they received bullet-injuries, said the OC.
In Dhaka, a team of police recovered two decomposed bodies from an open field in Uattara Diabari area around 2am, said Sub-inspector Rizia of Turag Police Station.
Locals spotted the bodies and informed police.
Later, police recovered the bodies and sent those of Dhaka Medical College Hospital morgue for autopsy, she added.