Witnesses have described new rounds of heavy fighting in the eastern Ukrainian city of Donetsk.
Two rebel-controlled tanks were seen heading towards the railway station in the eastern city of Donetsk, and the road was blocked in that direction.
A spokesman for Ukraine's military said the operation against "terrorists" in the east of the country was in an "active phase" but would not comment on where it was:
The active phase of the anti-terrorist operation is continuing. We are not about to announce any troop movements.
Thousands of online users have taken to social media to call for the victims of the Malaysian airliner crash to be returned to loved ones.
United States intelligence officials admitted that they do not know who fired the surface-to-air missile that downed flight MH17.
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