April 30 (Reuters) - Top U.S. refiner Marathon Petroleum ( MPC )

posted lower first-quarter profit on Tuesday, as

refining margins eased from elevated levels seen early last year

following Russia's invasion of Ukraine in 2022.

The Findlay, Ohio-based refiner posted net income

attributable to the company of $937 million, or $2.58 per share,

for the three months ended March 31, lower than the $2.7

billion, or $ 6.09 per share, it reported a year earlier.