Events in Ukraine

Trucks of a Russian convoy said to be carrying humanitarian aid for people caught in the conflict in eastern Ukraine are seen parked outside the southwestern Russian city of Voronezh August 13, 2014.

A pro-Russian rebel checks the car of a local citizen at the place where at least 12 militiamen fighting alongside government troops against pro-Russian separatists were killed in an ambush, on the outskirts of Donetsk, eastern Ukraine, Aug. 13, 2014.

Pro-Russian rebels stand at a security post where at least 12 militiamen fighting on the side of the Ukrainian government were killed, on the outskirts of Donetsk, eastern Ukraine, Aug. 13, 2014.

A damaged apartment after shelling in Donetsk, eastern Ukraine, Aug. 13, 2014.

Men reinforce a gas station with sacks of sand in Donetsk, Aug. 13, 2014.

A Ukrainian border guard checks a car at the crossing point Pletenivka, near the border with Russia, in the Kharkiv region, Aug. 13, 2014.