ພາບ​ຫຼ້າ​ສຸດ ຈາກ ຢູ​ເຄ​ຣນ

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

Ukrainian presidential candidate Petro Poroshenko speaks to supporters at a rally in the city of Krivyi Rih, 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.

An armed man of the Donbass Battalion, a volunteer militia group that has stated its intent to fight in support of Ukrainian unity, stands on patrol, at a base in the eastern Ukraine village of Velyka Novosilka, May 16, 2014.

Troops with the Donbass Battalion sleep in the village of Velyka Novosilka, near Donetsk, eastern Ukraine, May 16, 2014.

Pro-Russian rebels stand next to new trenches at a fortified front line rebel position near the town of Slovyansk, Ukraine, May 16, 2014.

Ukrainian paratroopers ride atop an armored personnel carrier in the village of Starovarvarivka, Ukraine, May 15, 2014.

A Ukrainian soldier digs a trench outside the village of Bylbasivka near the eastern Ukrainian town of Slovyansk, May 15, 2014.

A pro-Russian man shoots a grenade launcher against Ukrainian government troops at a checkpoint outside Slovyansk, eastern Ukraine, May 15, 2014.