Iran's foreign minister Hossein Amir-Abdollahian has warned Israel and the US that the Middle East may spiral out of control if Israel does not immediately stop its military action.
On the other hand, the Israel Defence Forces have vowed to intensify air strikes on Gaza and have warned Palestinians still in the north of the territory to flee south.
Israeli PM Benjamin Netanyahu has warned troops, that his people are in a battle for their lives and says the war against Hamas is "do or die".
Photos from a central Gaza hospital show lines of bodies, including at least 12 children and it is not clear when or where they died.
Israel says it killed "dozens of terrorists" overnight.
Hamas says 266 Palestinians have been killed in the past 24 hours, including 117 children.
Palestinian officials in Gaza say more than 4,600 have been killed since then.
Source: BBC News
