The incident took place yesterday afternoon when 15 employees were inside the factory of Excel Greentech.
Firemen took four hours to douse the fire. Later, six charred bodies were recovered from the spot.
District Magistrate N P Singh and Noida authority have both ordered separate probes into the incident.
"ADM Kumar Vineet will conduct a magisterial inquiry into the incident," District Magistrate NP Singh said.
Chief Executive Officer, Noida Amit Mohan Prasad said, "I have ordered a probe into the incident."
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Three deceased have been identified so far--marketing manager Indrabhan Choudhary, accountant Vivek Kochhar accountant and HR manager Jasmeet Kaur.
Police said a DNA test would be conducted on all the bodies.
The company had shifted from Ghaziabad to this new building six months ago.
The survivors said the sprinklers installed at factory did not function. The fire is believed to have been caused by a short circuit.
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