A Russian backed separatist rebel watches his position at the gate of a shelter under shelling in the Kievsky district, 3 km from the Airport, in Donetsk, Ukraine, Thursday, Jan. 22, 2015. A mortar shell hit a bus in the eastern Ukrainian rebel stronghold of Donetsk on Thursday, killing at least 13 people, the separatist leader in the city said. It was unclear immediately which side was responsible for the attack, which killed passengers instantly and blew out the windows of a nearby building. (AP Photo/Manu Brabo)
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