In the northeastern city of Sumy, a social welfare centre for children and an orphanage suffered damage after a missile strike on Sunday evening, injuring 13 people including four children, the mayor Oleksandr Lysenko said on Telegram.

"On September 2 overnight, the Russian occupiers carried out a missile attack on Kyiv, Sumy and Kharkiv regions using ballistic missiles, cruise missiles and anti-aircraft guided missiles, and attacked with Shahed-type UAVs from the south," the Ukranian air force said.

It said Ukrainian defence forces had shot down nine ballistic missiles, 13 cruise missiles and 20 attack drones.

Kyiv mayor Vitali Klitschko said two adults were injured and four cars caught fire from falling debris.

Vyacheslav Gladkov, the governor of Russia's Belgorod region which borders Ukraine, said an overnight aerial attack by Ukrainian forces wounded one person and damaged a shop and an infrastructure facility in the eponymous capital Belgorod.