There was no casualty or injury reported due to the fire, which broke out at around 6 am, informed Kamrup (Metro) Deputy Commissioner Prateek Hajela.
The fire was doused two hours after it broke out, despite the efforts of seven fire tenders. Reports suggest that thick fire still engulfed the area.
The fire may have been caused by a spark in a leaking crude oil carrying pipeline, Hajela suspected.
While refinery officials refused to ascertain the cause of the fire, locals also alleged that the fire was caused by a spark in the effluents released by the refinery in the bypass drain.
The exact loss due to the fire is still unknown.