Contractor Kiran Patel, site engineer Shiju John and site supervisor Prashant More were arrested this afternoon, he said.
They were booked on the charges of causing death by negligence, causing hurt by act endangering life or personal safety of others and negligent conduct with respect to fire or combustible matter among others, the official said.
The accused were produced in a local court which sent them in 14-day judicial custody, the official said, adding further investigation into the matter was underway.
The victims were construction workers and staying in the makeshift rooms at the site when the accident occurred.
The blaze led to an explosion in the LPG cylinders kept at the site, causing severe injuries to those present in the building.
Seventeen people were living in the makeshift accommodation in the stilt portion of the structure when the fire broke out.
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