Russian oil exports have dropped to the lowest levels since December.
Exports from Primorsk and Ust-Luga, two of the country's main ports, are down 41% in the last month and are on track to keep falling.
The decline comes as Russia moves to comply with cuts agreed to by the OPEC+ oil cartel. The country plans to cut production further in the coming months to make up for producing beyond its OPEC+ quota, sources said.
The Kremlin has generally complied with OPEC's guidance, and during a series of cuts in March, President Vladimir Putin backed the OPEC+'s efforts to maintain oil prices but voiced worries over losing market share to the US.
So far this year, Russian crude exports have fallen about 30,000 barrels a day from last year's average, and are down 620,000 barrels a day since peaking in April.
