Heavy fighting raged Sunday across Gaza, including in the devastated north, as Israel pressed ahead with its offensive after the U.S. blocked the latest international push for a cease-fire and rushed more munitions to its close ally.

Israel has faced rising international outrage and calls for a permanent cease-fire after the killing of thousands of Palestinian civilians. About 90% of Gaza‘s 2.3 million people have been displaced within the besieged territory, where U.N. agencies say there is no safe place to flee.