Fotografi

Presidential candidate Petro Poroshenko meets with supporters in the Cherkasy region, central Ukraine, May 20, 2014.

Pro-Russian gunmen sit on an armored personnel carrier with the words read "Battalion Vostok (East) " as they patrol in Donetsk, Ukraine, May 20, 2014.

Coal miners sit on a bus after finishing their shift at a coal mine outside Donetsk, Ukraine, May 20, 2014.

Vyacheslav Ponomarev, the self-proclaimed mayor of Slovyansk, speaks to citizens whose homes were ruined by shelling in Slovyansk, eastern Ukraine, May 20, 2014.

Yekaterina Len cries inside the remains of her house damaged by shelling as her grandson stands near her, in Slovyansk, eastern Ukraine, May 20, 2014.

A pro-Russian militant defends a front line position with a machine gun, Slovyansk, Ukraine, May 19, 2014. 

Residents watch the flames from a damaged gas pipe that was hit by a mortar bomb, during fighting between Ukrainian government troops and pro-Russian militants, outside Slovyansk, Ukraine, May 19, 2014. 

Pro-Russian militants detain three men they suspect of spying for the Ukrainian government in Kramatorsk, eastern Ukraine, May 18, 2014. 

A pro-Ukrainian activist prepares to hoist the Ukrainian flag in the town of Velika Novosyolka, in the Donetsk region, eastern Ukraine, May 17, 2014.

A masked pro-Russian militant stands behind the barricades at a checkpoint blocking the major highway outside Kharkiv, eastern Ukraine, May 17, 2014.