Ukraine and Russia say they have agreed to a Red Cross-led humanitarian aid mission to the eastern Ukrainian rebel stronghold of Luhansk.
The Kremlin earlier announced it was working with the Red Cross to send a humanitarian aid convoy to the region.
The EU Commission chief has warned Russia not to carry out unilateral military action “under any pretext”.
Ukraine and Western governments had previously objected to Russia sending any aid into the region.
The Red Cross has not yet commented on the latest announcements.