Ukrainian border guards have begun checks on a convoy of Russian trucks carrying aid supplies to the east of the country, the border guards service said.
Spokesman Andriy Demchenko told Reuters: "I can confirm that the Ukrainian side began border-customs formalities relating to the Russian humanitarian cargo."
But he said that at this point the cargo was still in Russian territory.
More top news
Daddy Day Care star Eddie Murphy is celebrating the birth of his ninth child.
A huge wildfire has prompted the evacuation of an entire Canadian city.
The garden of paedophile friends of serial killers Fred and Rosemary West is being dug up by police after a tip-off.