East Ukraine Rebel Chief Calls for Broad Mobilization

Ukrainian army vehicles drive through the fields of Debaltseve as fighting intensifies between government and rebel forces for control of this key railway hub, eastern Ukraine, Feb. 2, 2015.

People mourn during a funeral ceremony for Ruslan Boburov and Vadym Zherebylo, members of the self-defense battalion "Aydar," who were killed while fighting in eastern Ukraine, Feb. 2, 2015.

Servicemen from the battalion "Aydar" remove a Ukrainian flag from the Ukraine's Defense Ministry during a protest against the disbanding of the battalion, in Kyiv, Feb. 2, 2015.

A man stands in a flat damaged by recent shelling in Yenakieve, a town northeast of Donetsk, Feb. 2, 2015.

A man walks past a house damaged by recent shelling in Yenakieve, northeast of Donetsk, Feb. 2, 2015.

Pro-Russian separatists ride on a tank in Donetsk, eastern Ukraine, Feb. 1, 2015.