Russia says it's a humanitarian mission.
A convoy of 280 trucks bound for Ukraine.
Their cargo: food, water and medication.
But Kiev - along with the West - fears Moscow could turn the operation into a military intervention.
Ukraine's deputy foreign minister Danylo Lubkivsky.
(SOUNDBITE) (English) UKRAINIAN DEPUTY FOREIGN MINISTER, DANYLO LUBKIVSKY, SAYING:
"Let me be clear: you don't need tanks and artillery to bring food and medicine for civilians. Stop the aggression, stop the Russian terrorists, stop the shelling, stop your cynical propaganda - and there will be no need for any humanitarian aid."
Ukraine's said it will bar the convoy from crossing the border.
Some members of parliament labelling it a Trojan Horse.
Russia, though, insists its motives are purely peaceful.
Foreign Minister Sergei Lavrov earlier claiming permission had come from Kiev.
(SOUNDBITE) (Russian) RUSSIAN FOREIGN MINISTER, SERGEI LAVROV, SAYING:
