Soldiers of the 25th separate airborne brigade of the Ukrainian Armed Forces stationed outside Slovyansk leave their staging area on April 15. Ukrainian military forces were massing on the outskirts of the city on Wednesday, fortifying positions as fears grew that violent clashes with pro-Russian separatists could escalate.
Ukrainian Army troops await the issue of munitions at a field on the outskirts of Izyum, eastern Ukraine, on April 15. At the town of Izyum, about 30 miles northwest of Slovyansk, at least four helicopters had landed in a field alongside 17 other military units and special forces personnel.
Ukrainian Army troops receive munitions at a field on the outskirts of Izyum on April 15.
A Ukrainian soldier holds a hand grenade as Ukrainian army troops receive ammunition on the outskirts of Izyum.
Ukrainian army troops stand next to an armored vehicle with a Ukrainian flag on the outskirts of Izyum on April 15.
Ukrainian troops make their way towards Slovyansk on April 14.