What happened

A gas leak and subsequent blast and fire occurred in the storm-water drainage area of ONGC's Uran oil and gas processing plant while a CISF fire team investigated the leak. Three CISF firefighters—Eranna Nayakka, Satish Prasad Kushwaha and M. K. Paswan—and ONGC resident production superintendent C. N. Rao were killed; three other CISF personnel were injured. ONGC said the fire was contained within approximately two hours. Oil processing continued, while gas was diverted to the Hazira plant, but the interruption reduced compressed-natural-gas and piped-gas availability around Mumbai and temporarily closed some filling stations. Contemporary accounts differ on some response details, but the death toll, gas-leak origin and operational diversion are consistently reported.

When cited sources give different casualty, damage or spill figures for this event, they’re reported side by side above rather than merged into one number. See how confidence levels work.