Humanitarian aid is poised to roll into the stricken city of Oleshky on Friday, a Ukrainian official said, as a localized ceasefire between Russia and Ukraine stretched into a third day and military units cleared away landmines.

Moscow and Kyiv have observed the truce in and around the devastated southern Ukrainian city since Tuesday, despite remaining locked in war since Russia's all-out invasion of its neighbor more than 4 1/2 years ago.

Previous efforts to secure ceasefires either never worked out or the truces quickly fell apart.