Russia cut its oil output in April by an estimated 300,000 to 400,000 barrels per day, the sharpest monthly decline in six years, according to Reuters calculations and five anonymous sources. The reduction was driven by Ukrainian drone attacks on ports and refineries and a halt to crude supplies via the Druzhba pipeline. The Western Siberian basin, Russia’s main oil‑producing region, supplies the bulk of the country’s output, which is a key component of its $3 trillion economy. The decline comes amid ongoing Ukrainian attacks that have damaged major export gateways such as Ust‑Luga, Primorsk and Novorossiysk, and has forced the country to cut production to keep the remaining infrastructure operational. The April fall translates to a drop of between 500,000 and 600,000 barrels per day from late‑2025 production levels, according to the sources and Reuters calculations. In March, Russia’s crude production rose to 8.96 million barrels per day from 8.67 million barrels per day in February, while the Organization of the Petroleum Exporting Countries reported stable output at 9.167 million barrels per day. A source told Reuters that “Against the backdrop of ongoing attacks on Russia’s ports and refineries, it will be difficult to place oil without cutting output, especially with upcoming spring maintenance shutdowns.” Anton Siluanov, Russia’s finance minister, said that “high prices would help reduce the budget deficit.” RIA Novosti reported that Russia downed 11,211 Ukrainian drones in March, almost double the number in February. The Paris‑based IEA revised down Russia’s oil supply projection by 120,000 barrels per day for the rest of the year, citing persistent attacks on refineries and port infrastructure, and warned that Russia may struggle to increase production above early‑quarter levels in the near term. While the monthly decline may not translate into a permanent annual drop, the combination of drone attacks, pipeline shutdowns and scheduled maintenance could keep output below pre‑pandemic levels for the remainder of the year, tightening global supply and supporting higher prices.