(Reuters) - U.S. refiner Marathon Petroleum reported a jump in quarterly adjusted profit on Tuesday, riding on a surge in demand for fuel and refined products amid tight supplies.

Easing COVID-19 curbs and a travel boom have helped fuel demand near pre-pandemic levels this year, while Western sanctions against Russia over the Ukraine invasion have tightened an already-supplied market.

Refining capacity has especially been low because several less profitable operations were forced to close in the past two years due to the COVID-driven demand drop and a shift towards the production of cleaner fuels.

Marathon's refining and marketing margins rose to $37.54 per barrel in the second quarter ended June 30, from $12.45 per barrel year earlier.

Adjusted income was $5.69 billion, or $10.61 per share, compared with $437 million, or 67 cents per share, a year earlier. The year-ago quarter had benefited from a $11.68 billion gain on the sale of the Speedway unit.

(Reporting by Arunima Kumar in Bengaluru; Editing by Aditya Soni)