Amid refinery maintenance and rising domestic fuel prices, Russia is set to cut its diesel exports from its ports on the Baltic and Black Seas by nearly 25% in September compared to the export plans for August, Bloomberg reported on Friday, quoting industry data it had seen.

The shipments of diesel out of Russia’s western ports, including some exports from Belarus, are planned at 1.874 million tons in September, or 466,000 barrels per day (bpd), down from about 600,000 bpd planned for August exports, according to Bloomberg’s calculations.

The plan for diesel exports in September lays out the lowest shipments since May this year when spring refinery maintenance was in place.

Now the autumn refinery maintenance is also slashing diesel exports out of Russia.

The primary oil refining capacity that will be offline in Russia is set to soar by 44% in September compared to August amid seasonal maintenance, according to Reuters estimates based on data from industry sources.