The blaze broke out at a godown at Harihar complex in Dapoda around 12.30 PM, Thane Municipal Corporation said.
"It is not known what these people were doing in the godown and their identity is yet to be established," said Santosh Kadam chief of the Thane Municipal Corporation's (TMC) Regional Disaster Management Cell.
He said the administration's focus now is rescue operation.
The godown has been gutted in the fire, said the official, adding, fire engines from Bhiwandi and Thane were rushed to the spot to contain the fire.
The reason of the blaze is being investigated, Kadam said.
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