A Palestinian man is seen on the debris of a destroyed building following an overnight Israeli airstrike in Jabalia refugee camp, north of the Gaza Strip, on July 24, 2014. The health ministry in Gaza said in a press statement that over the past 17 days of the Israeli large-scale offensive on the Gaza Strip, the Israeli army killed over 700 Palestinians. (Xinhua/Wissam Nassar)

A Palestinian man is seen on the debris of a destroyed building following an overnight Israeli airstrike in Jabalia refugee camp, north of the Gaza Strip, on July 24, 2014. The health ministry in Gaza said in a press statement that over the past 17 days of the Israeli large-scale offensive on the Gaza Strip, the Israeli army killed over 700 Palestinians. (Xinhua/Wissam Nassar)

Palestinian inspect a destroyed building following an overnight Israeli airstrike in Jabalia refugee camp, north of the Gaza Strip, on July 24, 2014. The health ministry in Gaza said in a press statement that over the past 17 days of the Israeli large-scale offensive on the Gaza Strip, the Israeli army killed over 700 Palestinians. (Xinhua/Wissam Nassar)

Palestinians inspect a destroyed building following an overnight Israeli airstrike in Jabalia refugee camp, north of the Gaza Strip, on July 24, 2014. The health ministry in Gaza said in a press statement that over the past 17 days of the Israeli large-scale offensive on the Gaza Strip, the Israeli army killed over 700 Palestinians. (Xinhua/Wissam Nassar)

A Palestinian man is seen on the debris of a destroyed building following an overnight Israeli airstrike in Jabalia refugee camp, north of the Gaza Strip, on July 24, 2014. The health ministry in Gaza said in a press statement that over the past 17 days of the Israeli large-scale offensive on the Gaza Strip, the Israeli army killed over 700 Palestinians. (Xinhua/Wissam Nassar)