Ukrainian tanks move along a road near Eastern Ukrainian village of Novoselivka Persha July 31, 2014. Photo: Reuters/Valentyn Ogirenko
Members of Ukrainian self-defense battalion "Donbass" fire their weapon near the town of Pervomaysk July 31, 2014. Photo: Reuters/Maks Levin
A Ukrainian tank moves along a road near Eastern Ukrainian village of Novoselivka Persha July 31, 2014. Photo: Reuters/Valentyn Ogirenko
A member of Ukrainian self-defence battalion "Donbass" stands at the positions near the town of Pervomaysk July 31, 2014. Photo: Reuters/Maks Levin
Members of Ukrainian self-defense battalion "Donbass" are seen at their positions near the town of Pervomaysk July 31, 2014. Photo: Reuters/Maks Levin
Members of Ukrainian self-defense battalion "Donbass" are seen at their positions near the town of Pervomaysk July 31, 2014. Photo: Reuters/Maks Levin
A Ukrainian tank moves along a road near Eastern Ukrainian village of Novoselivka Persha July 31, 2014. Photo: Reuters/Valentyn Ogirenko
A member of Ukrainian self-defense battalion "Donbass" fires a rocket-propelled grenade (RPG) near the town of Pervomaysk July 31, 2014. Photo: Reuters/Maks Levin
A woman passes by members of Ukrainian self-defense battalion "Donbass" near the town of Pervomaysk July 31, 2014. Photo: Reuters/Maks Levin
Members of Ukrainian self-defense battalion "Donbass" are seen at their positions near the town of Pervomaysk July 31, 2014. Photo: Reuters/Maks Levin
Members of Ukrainian self-defense battalion "Donbass" move along a road near the town of Pervomaysk July 31, 2014. Photo: Reuters/Maks Levin
An armed pro-Russian separatist and a man show fragments of spent ammunition outside a damaged multi-storey block of flats following what locals say was recent shelling by Ukrainian forces in central Donetsk, July 29, 2014. Photo: Reuters/Sergei Karpukhin
A woman walks out of a damaged multi-storey block of flats carrying her belongings following what locals say was recent shelling by Ukrainian forces in central Donetsk, July 29, 2014. Photo: Reuters/Sergei Karpukhin
A car drives past the remains of a spent ammunition on the suburbs of Donetsk July 29, 2014.
Photo: Reuters/Sergei Karpukhin
Armed pro-Russian separatists stand guard on the suburbs of Shakhtarsk, Donetsk region July 28, 2014. Photo: Reuters/Sergei Karpukhin
Smoke rises above a damaged multi-storey block of flats following what locals say was shelling by Ukrainian forces in Shakhtarsk, Donetsk region July 28, 2014. Photo: Reuters/Sergei Karpukhin
A man walks into a damaged multi-storey block of flats following what locals say was recent shelling by Ukrainian forces in central Donetsk July 29, 2014. Intense fighting between Ukrainian troops and pro-Russian rebels in eastern Ukraine killed dozens of civilians, soldiers and rebels, as Kiev pressed on with an offensive on Tuesday including near the wreckage of Malaysian flight MH17. Shells hit the centre of Donetsk, a city with a pre-war population of nearly a million people where residents fear they will be trapped on a battlefield between advancing Ukrainian troops and Russian-backed rebels who have vowed to make a stand. Photo: Reuters/Sergei Karpukhin
Armed pro-Russian separatists inspect a van as they stand guard on the suburbs of Shakhtarsk, Donetsk region July 28, 2014. Photo: Reuters/Sergei Karpukhin