Russia launched drone strikes on civilian areas of Ukraine in another deadly overnight attack, Ukrainian authorities said on Tuesday, while Kyiv dismissed Russian President Vladimir Putin's declaration of a unilateral three-day ceasefire beginning next week.

Russian drone attacks killed a 12-year-old girl in central Ukraine and wounded three people in the capital Kyiv overnight, Ukrainian officials said.

At least 12 people were killed and dozens injured in overnight Russian strikes on Ukraine's capital, officials say.