Ukraine crisis: 'Sense of fear' in Mariupol
1 September 2014 Last updated at 10:10 BST
Ukrainian forces are battling pro-Russian rebels at the international airport of the eastern city of Luhansk, a Ukrainian military official has said.
Meanwhile, Russian Foreign Minister Sergei Lavrov has urged negotiators meeting later in Belarus to make an "immediate ceasefire" their priority.
Fighting has intensified in eastern Ukraine in recent days and the BBC's Richard Galpin says there is a "sense of fear" in Mariupol, despite the city being calm at present.