Russia said it shot down some 60 drones and several missiles over its territory while Ukraine in turn said it destroyed over 30 Russian drones. At least four people were reported killed in an attack on the outskirts of Kharkiv on Sunday as Russia pushed ahead with its renewed offensive in Ukraine’s war-ravaged northeast.

Russian air defences shot down 57 Ukrainian drones over the southern Krasnodar region overnight, the Russian Defence Ministry said. Local military officials said drone debris hit an oil refinery in the town of Slavyansk-on-Kuban, but there was no fire or damage. News outlet Astra published videos appearing to show an explosion at the refinery as it was hit by a drone. The videos could not be independently verified.