Kyiv: Russian ballistic missiles killed at ‌least three ⁠and ⁠injured 20 more in Kyiv early on Thursday, Mayor Vitali Klitschko ​said on the Telegram messaging app, damaging buildings and leaving parts of ​the Ukrainian capital without power. A fire broke out after Russia attacked the upper floors of a nine-story residential building, Klitschko ​said, and people were trapped in another ⁠place as ‌Moscow hit non-residential and apartment facilities, warehouses and ​a ​children's hospital. Also read: Russian missile attack kills 10 in northeast Ukraine, Zelenskiy vows responseA Reuters witness reported hearing more ⁠than a dozen explosions. In the region surrounding the ​Ukrainian capital, another person was killed, a local ​official said separately on Telegram. Russia and Ukraine exchange attacks daily following Russia's full-scale invasion of Ukraine in February 2022, and diplomatic efforts involving the United States and Europe have so far failed to bring a lasting ceasefire. Ukraine had handed ‌proposals to U.S. negotiators, Steve Witkoff and Jared Kushner, for a plan to end the ​war, President Volodymyr ​Zelenskiy said this ⁠month. Witkoff and Kushner were last in Moscow last January and have not yet visited Kyiv. Russia did not receive specific proposals ​for possible new meetings with U.S. negotiators, Maria Zakharova, the spokeswoman for Russia's foreign ministry, told the Izvestia newspaper, but Moscow would be ready to arrange a meeting at a short notice.