A fire broke out tonight inside a godown in the Tangra industrial estate of eastern Kolkata.
Fire brigade sources said the fire was first noticed on the ground floor of a seven-storey building and it soon spread to other floors.
As 20 engines were rushed to the spot, the blaze is now under control, firemen said.
There was no reports of causalities or injured, they said.
Fire services minister Javed Khan said the fire was expected to be totally doused within a couple of hours. Work is now on to douse the fire on the second floor.
Local MLA Swarnakamal Saha said locals came out for help initially before the fire brigade arrived.
Pointing out that elastic and foam was stored in the building, he said a stack of elastic first caught fire which spread as there was inflammable material around.
The owner of the building has complained that it was a case of sabotage, to which the minister Khan said, "We will look into the complaint. Forensic experts will come tomorrow to find the exact cause of fire".