Israel has ordered more evacuations in southern Gaza's main city as diplomats pressed on with efforts to secure a pause in the war that Hamas says has claimed 20,000 lives.

The United Nations said Israel had issued evacuation orders on Wednesday for large areas of Khan Yunis, where more than 140,000 displaced people were sheltering.

Israel told civilians to leave the north of the besieged Palestinian territory at the beginning of the conflict, urging them to seek safety in southern areas.

But as places for people to go continued to shrink, international outrage has mounted over the rising death toll.

In the southern city of Rafah, where fireballs and smoke rose after explosions on Wednesday, residents expressed hope that truce talks would succeed.

"I wish for a complete ceasefire, and to put an end to the series of death and suffering. It's been more than 75 days," Kassem Shurrab, 25, said.

New truce

Meanwhile, hopes that Israel and Hamas could be inching towards another truce and hostage release deal have risen this week as the head of the Palestinian militant group visited Egypt and talks were held in Europe.

Qatar-based Hamas chief Ismail Haniyeh arrived in Egypt on Wednesday for talks with the country's intelligence chief Abbas Kamel.

Haniyeh also met Iranian Foreign Minister Hossein Amir-Abdollahian but no details were released.

A Hamas official told Agence France-Presse that "a total ceasefire and a retreat of the Israeli occupation army from the Gaza Strip are a precondition for any serious negotiation" on a hostage-prisoner swap.

Israeli Prime Minister Benjamin Netanyahu said there could be no ceasefire in Gaza before the "elimination" of Hamas.

The war began when Hamas attacked Israel on 7 October, killing around 1,140 people, mostly civilians, and abducting about 250, according to an AFP tally based on Israeli figures.