"Given the complex logistics and security challenges involved, this aid operation will take some time and we call on the authorities of both countries to do all they can to resolve outstanding issues quickly,” said Laurent Corbaz, ICRC head of operations for Europe and Central Asia.
“People are struggling to cope with limited access to basic services such as water and electricity, so speed is of the essence,” he said.
He said a five-person ICRC team had already arrived at the site in Russia's Rostov Region where the convoy was waiting for permission to cross the Ukrainian border.
The convoy of 262 KamAZ trucks carrying about 2,000 tonnes of food, medicines and other aid set off from the Moscow Region to eastern Ukraine on August 12.
A source told Itar-Tass earlier on Friday that a group of Ukrainian border and customs officials had started inspecting the convoy.