Ukraine says it attacked a refinery owned by Russia's largest oil producer Rosneft PJSC overnight, marking its first strike on a major oil-processing facility in nearly two weeks.

The targeted facility is located in Ryazan, a key industrial region. Ukraine's military claimed responsibility for the attack, which represents an escalation in its campaign against Russian energy infrastructure. The strike on the Rosneft refinery comes after a brief pause in such operations.

Officials in Kyiv have not provided immediate details on the extent of damage or whether operations at the plant were halted. Rosneft PJSC, as the country's dominant oil producer, operates multiple refineries across Russia, making this a significant target.

The attack underscores Ukraine's strategy of pressuring Russia's economic lifelines, particularly its energy export revenues. This development follows previous strikes on oil depots and processing plants in border regions.