Reports of heavy fighting in eastern Ukraine
27 July 2014 Last updated at 22:38 BST
There are reports of heavy fighting in eastern Ukraine, close to the site where Malaysia Airlines flight MH17 crashed.
Government forces are trying to regain control of the the area from pro-Russian separatists.
It means a team of Dutch and Australian police officers have been forced to postpone a visit to the crash site.
Tom Burridge reports from Kharkiv.