Ukraine is halting further Russian advances after suffering its largest territorial loss for 18 months.
Ukraine says it has moved troops to "advantageous positions" as Russia intensifies its attacks on the region.
Ukraine is concerned about what could happen if Russian troops get within artillery range of Kharkiv.
The BBC's Jonathan Beale meets front line soldiers battling Russia's new incursion in north-east Ukraine.
Footage shows the moment a major TV tower broke in half and fell to the ground in the Ukrainian city of Kharkiv.Local officials said it was likely to be a ...
Russian rockets slammed into residential buildings in Kharkiv before dawn on Saturday, Ukrainian officials said, killing at least six people and injuring at ...
Attacks on the closest big city to the Russian border have been intensifying in recent weeks.