ພາບ​ຫຼ້າ​ສຸດ ຈາກ ຢູ​ເຄຣນ

Ukrainian presidential candidate Petro Poroshenko is welcomed by his supporters during a rally in Konotop, Ukraine, May 15, 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.

Armed Pro-Russian men prepare themselves to confront Ukrainian government troops at a checkpoint outside Slovyansk, eastern Ukraine, May 15, 2014.

Pro-Russian gunmen guard a checkpoint outside Slovyansk, eastern Ukraine, May 15, 2014.

A gas mask with a helmet is placed on a barricade at the regional administration building in the eastern Ukrainian city of Donetsk, May 15, 2014.