A video of the lynching went viral on social media
Rescuers from the Fire Service and Army recovered the body - rather a skeleton or remains of a victim, on Saturday noon, Tongi Police Station Sub-Inspector Sumon Bhakta said.
The Sept 10 fire that caused by a gas line booster explosion has so far claimed 36 lives.
Six of the dead, who were burned so badly, could not be identified by the health and rescue officials.