Another victim, who was injured in the boiler blast in Gazipur, has died at Dhaka Medical College Hospital in the capital.
Kamal Hossain died at the hospital's burn unit around 7:15am Tuesday, taking the death toll to seven in the incident.
Inspector Mozammel Haque, in-charge of DMCH police camp, confirmed the death to the Dhaka Tribune.
The boiler in the factory named Smart Metal and Chemical, located in Pubail of Gazipur, exploded with a loud bang around 4pm Saturday.
Around 30 people were working in the factory which caught fire right after the explosion.