A Palestinian boy places a Hamas flag atop the rubble of a house which police said was destroyed in an Israeli air strike in the northern Gaza Strip July 9, 2014. At least 23 people were killed across Gaza, Palestinian officials said on Wednesday, by a bombardment Israel said may be just the start of a lengthy offensive against Islamist militants whose rockets struck deeper than ever before into Israel. REUTERS/Mohammed Salem (GAZA - Tags: POLITICS CIVIL UNREST)