Russia on Sunday launched a massive drone and missile attack on Ukraine, described by officials as the largest over the past months, targeting energy infrastructure and killing civilians.The attack came as fears are mounting about Moscow’s intentions to devastate Ukraine's power generation capacity ahead of the cold winter.

Russia's combined drone and missile attack was the most powerful in three months, according to Kyiv's City Military officials.

Ukraine's defenses must be "100 percent effective," Ukrainian President Volodymyr Zelensky said in his evening address on Saturday.

Russia launched one of the largest missile attacks since the start of the war targeting Ukraine's energy infrastructure overnight. At least 10 people were killed. Ukrainian president Volodymyr Zelensky described the air raids as a "massive combined strike on all regions" aimed at damaging the country's energy infrastructure.