Many oil refineries have caught fire recently. Whether caused by drone strike or accident, the result is the same: more pressure on shaky energy systems.

Ukrainian drones are flying deep into Russia to strike oil facilities. Plumes of smoke can be seen from space and toxic rain has fallen on tourist destinations on the Black Sea.

California is importing fuel made from Russian crude oil just as the Iran war tightens global crude oil supplies.

Ukraine said it hit a Russian export-oriented refinery and oil-pumping station in Kirishi near the Baltic coast, as Kyiv ramps up attacks ahead of planned Victory Day ceasefires.

Ukrainian forces launched a missile and drone attack on multiple Russian regions overnight on May 5, reportedly striking a critical Russian military-industrial site in Cheboksary, Chuvash Republic, Russian Telegram media channels reported.

Ukrainian strikes have left fires burning at the Tuapse refinery and oil slicks along the Black Sea coast ahead of Russia's tourist season.

Russia and Ukraine announced distinct ceasefires on different days this week, with Moscow warning Kyiv not to violate its unilateral plans to stand down temporarily on Saturday when it marks the defeat of Nazi Germany in World War II.

A midmorning Russian missile attack on the town of Merefa, in Ukraine's northeastern Kharkiv region, killed ‌seven people and wounded more than 30, including a 2-year-old boy, Ukrainian officials said on Monday.