Russia despatched its own aid convoy of nearly three hundred lorries to eastern Ukraine where pro-Russian rebel fighters are.
Kiev and Western governments warned Moscow against any attempt to turn the operation into a military intervention by stealth in a region facing a humanitarian crisis after four months of warfare.
ITV News Europe Editor James Mates reports:
More top news
Read Sadiq Khan's full victory speech, as the Tooting MP promised to be a mayor for "all Londoners".
A list of results for London Mayor and the London Assembly