As per the police, the cause of the accident is unclear and an investigation is under way.
The fire blocked an entrance to the church, causing a stampede, they said, adding that most of those killed were children.
According to SP Siddharth Bahuguna, prima facie, it appears an electrical short circuit caused the blaze.
Congress leader Jairam Ramesh hit out at the BJP government, saying it is shameful that a tribal woman is burnt in a state ruled by the party.
Firefighters are still working to put out deadly blaze at Sitakund near Chittagong.
The impact of the explosion was so intense that the roofs of some of the factories located in the vicinity were damaged.
However, it is yet to be learnt whether or not he was present in the building at the time of the incident.
The cause of this fire was the same as in most of the cases -- a short circuit.
The fire first broke out on the first floor which housed a CCTV and router manufacturing company.
The death toll in the Mundka inferno may further increase as search operation teams have found more charred remains from the second floor of the ill-fated four-storey building.