epa04325495 Israeli cannon fires artillery shells from an artillery unit near the Israeli border with Gaza, 21 July 2014. Four Palestinians were killed and 50 others wounded when Israeli shells struck a hospital in central Gaza, despite a call by the UN Security Council for a truce. The international community on Monday stepped up efforts to mediate for a truce between Israel and Hamas, as the death toll in the Gaza Strip neared 550. EPA/ABIR SULTAN
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