Israeli tanks backed by warplanes and drones have advanced deeper into the western part of the Gaza Strip city of Rafah, killing eight people, according to residents and Palestinian medics.
Residents said the tanks moved into five neighbourhoods early on Wednesday.
Heavy shelling and gunfire hit the tents of displaced families in the Al-Mawasi area, further to the west of the coastal enclave, they said.
Some eight months into the war, there has been no sign of let-up in the fighting as efforts by international mediators, backed by the United States, have failed to persuade Israel and Hamas to agree to a ceasefire.
Israeli forces have laid waste to much of Gaza and seized most of the Palestinian territory but have yet to achieve their stated goal of wiping out Hamas and freeing Israeli hostages.
Medics and Hamas media said eight Palestinians were killed in Al-Mawasi and many families fled north in panic.
They did not identify the fatalities and the Israeli military said it was looking into the report.
Residents said Israeli army forces blew up several homes in western Rafah, which had sheltered more than half of Gaza's 2.3 million people before May, when Israel began its ground offensive and forced most of the population to head northwards.
Some United Nations and Palestinian figures put those who remained at under 100,000 people.
"Another night of horror in Rafah. They opened fire from planes, drones and tanks on the western areas to cover for their invasion," said one Rafah resident, who asked not to be named.
"Bullets and shells landed in the Mawasi area near where people slept, killing and wounding many," he told Reuters via a chat app.
An Israeli commander briefing military correspondents in Rafah on Tuesday named two more locations there - Shaboura and Tel Al-Sultan - where the army planned to take on Hamas fighters.
"The Hamas battalions there are not yet well worn down and we need to dismantle them completely. We estimate it at more or less a month, at this intensity," Colonel Liron Batito, head of the Givati Brigade, told Army Radio.
The Israeli military remained in control of the borderline between Rafah and Egypt.
Footage circulated on social media showed the Rafah crossing, the only window for most of Gaza's population with the outside world, was destroyed, buildings burnt, and Israeli tanks positioned there with the flag of Israel flying over some places.
The Israeli military said aid into Gaza had not been impeded by the damage.
Further north, Israel sent a column of tanks back into the Zeitoun neighbourhood in Gaza City and residents reported heavy fire from tanks and warplanes but also sounds of gun battles with Hamas-led fighters.
In another Gaza City suburb, Sheikh Radwan, an Israeli air strike on a house killed four Palestinians, including a child, medics said. A total of 20 people had been killed across Gaza.
The armed wings of Hamas and Islamic Jihad said fighters battled Israeli forces with anti-tank rockets and mortar bombs, and have in some areas detonated pre-planted explosive devices against army units.
Later on Wednesday, Palestinian gunmen fired rockets at the Kerem Shalom crossing in southern Gaza, the Israeli military said.
Israel's ground and air campaign was triggered when Hamas-led militants stormed into southern Israel on October 7, killing about 1200 people and seizing more than 250 hostages, according to Israeli tallies.
The offensive has left Gaza in ruins, killed more than 37,400 people, according to Palestinian health authorities, and left much of the population homeless and destitute.
Since a week-long truce in November, repeated attempts to arrange a ceasefire have failed, with Hamas insisting on an end to the war and full Israeli withdrawal from Gaza.
Netanyahu refuses to end the war before Hamas is eradicated and the hostages are freed.
On Wednesday, the United Nations human rights office said Israeli forces might have repeatedly violated fundamental principles of the laws of war and failed to distinguish between civilians and fighters in their Gaza campaign.
Israel's permanent mission to the United Nations in Geneva called the analysis of six Israeli attacks "factually, legally, and methodologically flawed".
