Israel warns Gaza City residents to flee to 'humanitarian area' - as another tower is bombed

Any remaining residents in Gaza's largest city should leave for a designated area in the south, Israel's military warned, before bombing a high-rise tower.

Israeli forces are carrying out an offensive on the suburbs of Gaza City, in the territory's north, as part of plans to capture it - raising concerns over a growing humanitarian crisis. While Prime Minister Benjamin Netanyahu has faced pressure to stop the attack and allow more aid in, the military has announced a new humanitarian zone in the south.

Spokesperson Avichay Adraee said Gaza City residents should head to a designated coastal area of Khan Younis, where, he said, they would be able to receive food, medical care and shelter. Within hours, Israel had bombed a high-rise tower in Gaza City, claiming it was being used by Hamas, though it did not provide evidence.

Israel's Defence Minister Israel Katz shared a video of what appeared to be the building collapsing after the strike, which comes the day after a separate building was bombed. It is not immediately clear if there are any casualties.

Before the strike, health authorities in the Hamas-run territory reported at least 23 Palestinians have been killed on Saturday, including at least 13 in the Gaza City area. On Thursday, Israel said it has control of around 40% of Gaza City and 75% of the entire territory of Gaza.

Many of the city's residents had already been displaced earlier in the war, only to return later. Some of them have said they will refuse to move again.

That's despite the military claiming it is within a few kilometres of the city centre, coming after weeks of heavy strikes. But the war in Gaza has left Israel increasingly isolated in the diplomatic sphere, with some of its closest allies condemning the campaign that's devastated the territory.

Just two weeks ago, a famine was declared in Gaza City and surrounding areas by the Integrated Food Security Phase Classification, a globally recognised system for classifying the severity of food insecurity. There is also concern within Israel, where calls have grown to stop the war and secure the release of the remaining 48 hostages.

Israel believes 20 of those hostages are still alive. Even as relatives of those hostages lead protests, Mr Netanyahu continues to push for an all-or-nothing deal to release all hostages and defeat Hamas.

Read more:Israel strikes high-rise building in Gaza CityWest Bank family describe daily harassment On Friday, Donald Trump said Washington is in "very deep" negotiations with Hamas to release the captives. "We said let them all out, right now let them all out.

And much better things will happen for them but if you don't let them all out, it's going to be a tough situation, it's going to be nasty," he added. Hamas is "asking for some things that are fine.