Seven people were also injured in "heavy shelling" by Ukrainian forces of the centre of Donetsk, Denis Pushilin, the Russian-appointed head of the broader Donetsk region of which the Donetsk city is the administrative centre, wrote on the Telegram messaging app.

Ukraine's air force said that Russia launched a new overnight air attack, targeting Mykolaiv, Odesa and Dnipro regions.

(Reporting by Lidia Kelly in Melbourne; editing by Diane Craft)