A major fire on Saturday broke out at Numaligarh Refinery Limited in Assam's Golaghat district, officials said.
There was an explosion at the hydrogen cracker plant area of the refinery at about 6:35 pm when the fire broke out, they said.
However, the cause of the blaze was yet to be ascertained, the officials said. Fire tenders posted at the refinery have rushed to the spot to douse the flames, a senior NRL official said.