Gaza-Israel: 'Scenes of devastation' in Gaza City
22 July 2014 Last updated at 17:30 BST
The United Nations says about 102,000 displaced people are now using shelters across Gaza as the Israeli offensive continues.
Nearly 600 Palestinians and 29 Israelis have been killed in 15 days of renewed conflict.
The BBC's Paul Adams reports from Gaza City where rescue workers try to retrieve bodies from buildings brought down by missile strikes.