"I am in constant contact with partners since early morning today to coordinate a resolute response to Russian attacks. I am also interrupting my Africa tour and heading back to Ukraine immediately," he tweeted.

Mr Kuleba has been on an apparent counteroffensive tour following a visit to the continent by Russia's top diplomat Sergei Lavrov in July.

He has been to Senegal, Ivory Coast and Ghana during the trip.

Ukraine President Volodymyr Zelensky has repeatedly made overtures to African leaders to condemn Russia over its invasion of his country.