Russia launched a drone strike on the Ukrainian capital Kyiv early on Wednesday, wounding at least six people and damaging buildings in two districts, city officials said. Explosions boomed across the morning sky as Ukraine's air force warned of drones approaching the city and Mayor Vitali Klitschko said air defences were repelling an enemy attack.

Russia attacked Ukraine's energy system and some cities in an "inhuman" Christmas Day assault, Ukraine's President Volodymyr Zelenskyy said.

Russia launched more than 40 attack drones across the Azov Sea into eastern and central Ukraine overnight, damaging houses in Kharkiv and Odessa, the Ukrainian military said.

Russia early Wednesday morning launched a drone strike on the Ukrainian capital, Kyiv, injuring no fewer than three people and damaging buildings in two districts. City officials said explosions boomed across the morning sky shortly after Ukraine’s air force warned of drones approaching the city.

A massive Russian attack on Ukraine triggered an air alert across the country on Tuesday morning. However, it wasn't just a challenging morning for Ukrainians; Russians also faced disruptions. A drone attack prompted the implementation of the "Carpet" plan at several Russian airports.

Russia launched an aerial attack on Ukraine on Tuesday, striking the capital and other regions with multiple missiles and drones. Ukraine's air force reported a ballistic missile threat at 3:00 a.m. (0100 GMT),