There are fears that the war will spill over into the region, including in Lebanon, where the Israeli army and Iranian-backed Hezbollah group have been exchanging fire.
Israeli tanks advanced into the fringes of Gaza City on Monday, witnesses said, as it ramped up its war on Hamas saying it had killed dozens of operatives in hundreds of strikes.
The Israeli military has "increased" its military attacks in Gaza on Friday night local time, intensifying its air operations while also expanding ground activity.
Israel military said they had conducted "limited" grounds raids into the Gaza Strip overnight to fight Hamas fighters, news agency Reuters reported. The army said the strikes were aimed at destroying sites where Hamas was assembling to attack Israel.