A Palestinian man holds a girl, whom medics said was injured in an Israeli shelling at a U.N-run school sheltering Palestinian refugees, at a hospital in the northern Gaza Strip July 24, 2014. At least 15 people were killed and many wounded on Thursday when Israeli forces shelled a U.N.-run school sheltering Palestinian refugees in northern Gaza, said a spokesman for the Gaza health ministry, Ashraf al-Qidra. Chris Gunness, spokesman for the main U.N. agency in Gaza UNRWA, confirmed the strike and criticised Israel. The Israel army had no immediate comment on the reports. Hamas fired rockets at Tel Aviv and said its gunmen carried out a lethal ambush on Israeli soldiers in north Gaza. [Photo/Agencies]