The refinery in Sizran, Russia, has ceased operations due to Ukrainian drone attacks. Additionally, oil equipment has been damaged in the Yaroslavl region.

The refinery in the Russian city of Syzran, located in the Samara region, has ceased operations due to damage caused by a Ukrainian drone attack, according to a statement from the Ukrainian General Staff. The attack occurred on May 21, 2026, and the refinery has been confirmed to be affected. In addition, the General Staff reported damage to several oil tanks and equipment in the Yaroslavl region, recently attacked by Ukrainian forces.

Ukraine has intensified attacks on Russian oil infrastructure to undermine the Russian army's fuel supply and reduce revenues generated by this industry. Additionally, Kyiv has reported an increase in drone attacks on Russian military and logistical targets in the occupied territories.