US President Donald Trump urged Hamas on Tuesday to accept a 60-day ceasefire in Gaza, saying that Israel had agreed to finalise the terms of such a deal.

"Israel has agreed to the necessary conditions to finalize the 60 Day CEASEFIRE," Trump wrote on Truth Social, adding that representatives of Qatar and Egypt "will deliver this final proposal" to Hamas.

"I hope, for the good of the Middle East, that Hamas takes this Deal, because it will not get better - IT WILL ONLY GET WORSE," he added.

This comes despite the Israeli military earlier saying it had expanded its operations in Gaza, where residents reported fierce gunfire and shelling days before a planned trip to Washington by Prime Minister Benjamin Netanyahu.

Gaza's civil defence agency said Israeli forces killed at least 26 people on Tuesday.

In response to reports of deadly strikes in the north and south of the territory, the Israeli army told AFP it was "operating to dismantle Hamas military capabilities".

Separately, it said Tuesday morning that in recent days it had "expanded its operations to additional areas within the Gaza Strip, eliminating dozens of terrorists and dismantling hundreds of terror infrastructure sites both above and below ground".

Raafat Halles, 39, from the Shujaiya district of Gaza City, said "air strikes and shelling have intensified over the past week", and tanks have been advancing.

"I believe that every time negotiations or a potential ceasefire are mentioned, the army escalates crimes and massacres on the ground," he said. "I don't know why."

The Red Cross warned that Gaza's few functioning medical facilities were overwhelmed, with nearly all public hospitals "shut down or gutted by months of hostilities and restrictions" on supplies.

"The International Committee of the Red Cross is deeply alarmed by the intensifying hostilities in Gaza City and Jabaliya, which have reportedly caused dozens of deaths and injuries among civilians over the past 36 hours," the ICRC said in a statement. (AFP)