Health Minister Satyendra Jain, who accompanied the LG, said autopsies were conducted only on the bodies that had been identified.
"We have formed a committee to look into the matter. People showed us wrappers of firecrackers, I do not think anyone has a licence to manufacture firecrackers in Delhi," Jain said, adding it was a serious offence.
Does not matter if the culprit is a private owner or a government official, action will be taken, he added.
The fire, which erupted on the ground floor of the two- storey firecracker storage unit in outer Delhi's Bawana industrial area, killed 17 people yesterday and injured two others.