(Reuters) - Indian Oil Corp's Gujarat refinery operations were unaffected after a benzene storage tank caught fire, India's top refiner said in a statement.

The fire occurred around 3:30 p.m IST on Monday and the cause of the fire is yet to be ascertained, IOC said.

IOC runs a 13.7 million metric tonnes per annum integrated refinery-cum-petrochemical complex in Gujarat.

(Reporting by Sethuraman NR; Editing by Abinaya Vijayaraghavan)