A woman reacts outside a damaged hospital in Donetsk February 4, 2015. REUTERS/Maxim Shemetov

A man walks near a building, which according to locals was damaged by shelling, in Donetsk February 4, 2015. REUTERS/Maxim Shemetov

A tank of the separatist self-proclaimed Donetsk People's Republic is seen near Yenakiieve, Donetsk region, February 4, 2015. REUTERS/Maxim Shemetov

A member of the armed forces of the separatist self-proclaimed Donetsk People's Republic looks on near a building destroyed during battles with the Ukrainian armed forces in Vuhlehirsk, Donetsk region, February 4, 2015. REUTERS/Maxim Shemetov

A member of the armed forces of the separatist self-proclaimed Donetsk People's Republic holds up a large-caliber bullet for the camera in Vuhlehirsk, Donetsk region, February 4, 2015. REUTERS/Maxim Shemetov

People surround the remains of ammunition, following shelling according to locals, in Donetsk February 4, 2015. REUTERS/Maxim Shemetov

he body of a member of the armed forces of the separatist self-proclaimed Donetsk People's Republic, who was killed in battle with the Ukrainian armed forces, is seen in Vuhlehirsk, Donetsk region, February 4, 2015. REUTERS/Maxim Shemetov

People look at a building, which according to locals was damaged by shelling, in Donetsk February 4, 2015. REUTERS/Maxim Shemetov

A view shows an Orthodox church outside Zhdanivka, Donetsk region, February 4, 2015. REUTERS/Maxim Shemetov

Members of the armed forces of the separatist self-proclaimed Donetsk People's Republic gather near a burnt armored vehicle in Vuhlehirsk, Donetsk region, February 4, 2015. REUTERS/Maxim Shemetov

A member of the armed forces of the separatist self-proclaimed Donetsk People's Republic shows the body of his comrade-in-arms, who was killed in battle with the Ukrainian armed forces, in Vuhlehirsk, Donetsk region, February 4, 2015. REUTERS/Maxim Shemetov

A member of the armed forces of the separatist self-proclaimed Donetsk People's Republic walks near a burnt tank turret in Vuhlehirsk, Donetsk region, February 4, 2015. REUTERS/Maxim Shemetov

A local resident surveys damage done to a hospital in Donetsk February 4, 2015. REUTERS/Maxim Shemetov

Members of the armed forces of the separatist self-proclaimed Donetsk People's Republic gather near an armored vehicle destroyed during battles with the Ukrainian armed forces in Vuhlehirsk, Donetsk region, February 4, 2015. REUTERS/Maxim Shemetov

The covered body of a member of the armed forces of the separatist self-proclaimed Donetsk People's Republic, who was killed in battle with the Ukrainian armed forces, is seen in Vuhlehirsk, Donetsk region, February 4, 2015. REUTERS/Maxim Shemetov

A man stands near a window as broken glass is seen on the ground following shelling, according to locals, in Donetsk February 4, 2015. REUTERS/Maxim Shemetov

A tank of the separatist self-proclaimed Donetsk People's Republic, damaged during battles with the Ukrainian armed forces, is seen on the roadside outside Vuhlehirsk, Donetsk region, February 4, 2015. REUTERS/Maxim Shemetov

Members of the armed forces of the separatist self-proclaimed Donetsk People's Republic gather near a building destroyed during battles with the Ukrainian armed forces in Vuhlehirsk, Donetsk region, February 4, 2015. REUTERS/Maxim Shemetov

The covered body of a victim of shelling is seen outside a damaged hospital in Donetsk February 4, 2015. REUTERS/Maxim Shemetov

A member of the armed forces of the separatist self-proclaimed Donetsk People's Republic looks at the body of a soldier of the Ukrainian armed forces in Vuhlehirsk, Donetsk region, February 4, 2015. REUTERS/Maxim Shemetov

A local resident surveys damage done to a hospital in Donetsk February 4, 2015. REUTERS/Maxim Shemetov

People gather outside a damaged hospital in Donetsk February 4, 2015. REUTERS/Maxim Shemetov