Clashes break out in Ukraine as crash investigators arrive

Ukraine launched a military assault to break pro-Russian rebels' hold on the eastern city of Donetsk on Monday in the first major hostilities in the area since Malaysia Airlines flight MH17 was shot down last week. As investigators arrived to inspect the bodies of hundreds of victims near the crash site, the fighting in Donetsk served as a reminder of the dangers they face working in a war zone.
Background:
Fighting erupts in Ukraine as crash investigators arrive [Reuters]
MH17 plane crash: Kerry points finger at Russia [BBC]