Israeli Prime Minister Benjamin Netanyahu accused the leaders of France, Britain and Canada of wanting to help the Palestinian militant group Hamas after they threatened to take "concrete action" if Israel did not stop its latest offensive in Gaza.

Aid was just beginning to trickle back into the war-torn territory after Israel announced it would allow limited shipments to resume as it pressed a newly expanded offensive aimed at destroying Hamas.

Israeli airstrikes killed at least six Palestinians guarding aid trucks against looters, Hamas officials said on Friday, as the head of the United Nations warned that only a "teaspoon" of aid was getting in following Israel's 11-week-long blockade.