Russia launches drone attack on Ukraine's Kyiv, mayor says

"All emergency services are on site," Mayor Vitali Klitschko said in a post on the Telegram messaging app. "So far, there are no injuries reported."

Reuters witnesses heard a series of explosions in what sounded like air defence systems in operation.

(Reporting by Valentyn Ogirenko in Kyiv and Lidia Kelly in Melbourne; Editing by Jamie Freed)