"Emergency response personnel extinguished the fire in about 10 minutes and one employee sustained burn injury. No casualty has been reported," she said.
The injured employee has been admitted to a private hospital for treatment.
A multi-disciplinary committee has been constituted to investigate the cause of fire, she said. The FCC was the only unit involved (in the fire) and it was temporarily shut down.
From today (Wednesday) morning, the unit has been restarted. Gujarat refinery's other processing units are operating normally, she said. Appropriate government agencies have been informed about the mishap, she added.
Gujarat refinery, with 13.7 million refining capacity, is the largest refinery owned by the Indian Oil corporation (IOC).
FCC units are standard installations widely used throughout the world on oil refineries for converting the heaviest components of crude oil into a range of useful products such as motor fuels.