The Ukrainian foreign ministry on Friday criticised a vote organised by Moscow in four regions it claims to have annexed -- Donetsk, Lugansk, Zaporizhzhia and Kherson -- as well as Crimea.

"By organising fake elections in the Ukrainian regions and Crimea, the Kremlin continues to delegitimise the Russian legal system," the foreign ministry said, calling on partners to "condemn the worthless and arbitrary actions of Russia and not to recognise the legitimacy of  any 'administration'."