Ukraine claimed it hit a major oil refinery that supplies Moscow and its airports, as part of a record drone barrage ahead of talks between Kyiv and the US over a potential ceasefire.

Ukraine on Tuesday launched its biggest ever drone attack on Moscow and the surrounding region, killing at least three employees of a meat warehouse, injuring 17 others and causing a short shutdown at the Russian capital's four airports,

Russia said it was hit by a “massive” drone attack overnight Tuesday, hours ahead of critical talks between officials from Washington and Kyiv.