At least 30 killed in shelling in Ukrainian city of Mariupol, officials say

Photos: Crisis in Ukraine
Ukrainian security forces patrol in the village of Bobrovyshche on July 14, 2015. More than 6,400 people have been killed in the conflict in Ukraine since April 2014, the United Nations says.
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Photos: Crisis in Ukraine
Ukrainian security forces on the lookout in Bobrovyshche on July 14. The country's troops face daily attacks from Russian-backed separatists despite a ceasefire being in place.
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Photos: Crisis in Ukraine
A man with a machine gun is among the Ukrainian troops standing guard