In Gaza's northern Jabalia, there have been reports of fierce fighting following the Israeli military's return to areas where it claimed Hamas had regrouped.
Tanks are moving near Jabalia's refugee camp, which has been heavily bombarded since Saturday, according to evacuating residents.
Armed Palestinian factions claimed to be engaged in combat with camp forces.
In the meantime, the UN reports that since an offensive started a week ago, 360,000 Palestinians have left the southern city of Rafah.
With over a million Palestinians seeking safety in the eastern part of the city, the Israeli military has ordered its evacuation.A US Secretary of State Antony Blinken forewarned Israel on Sunday that launching a full-scale offensive in Rafah may lead to "anarchy" rather than the destruction of Hamas.
His remarks mirrored briefings given to Israeli media by unidentified senior Israeli military officials, who said that the absence of a clear Israeli government plan for the "day after" the war was the reason behind Hamas's revival in northern Gaza.
After claiming to have "dismantled" Hamas's battalions in the north, the military lowered its activity levels there in January. However, that created a void in authority that allowed the gang to grow again.
According to the chief of the World Food Programme, an estimated 300,000 people who are stranded in the damaged region are also going through a "full-blown famine" as a result of a lack of relief delivery. When tanks moved into the region, locals who were captured on camera running away from Jabalia on foot on Monday morning stated they made the decision to evacuate.
"We have no idea where to go. We have been uprooted and relocated," a woman told the Reuters news agency. "We're sprinting through the streets. I was able to witness it myself. I observed the bulldozer and the tank." The military arm of Palestinian Islamic Jihad and Hamas, both of which are classified as terrorist organizations by the US, Israel, the UK, and other nations, reported that its members were using machine guns, anti-tank missiles, and mortars to target Israeli forces in and around the Jabalia camp.
The Safa news agency, which is connected with Hamas, also reported on fighting between Israeli tanks and Palestinian armed groups east of the Jabalia camp's market, close to a number of UN-run schools that people were using as shelters.
Meanwhile, two individuals were murdered in Israeli strikes on residences in Jabalia camp on Monday, according to the official Palestinian news agency Wafa, and several more people were killed in a strike in Jabalia town.
Additionally, it quoted medical personnel stating that thus far, 20 civilians' bodies had been found in Jabalia and sent to the Kamal Adwan hospital in Beit Lahia.
The Israel Defense Forces (IDF) did not immediately respond to requests for comment.
According to information provided by the IDF on Sunday, forces had started their operation in Jabalia the night before "based on intelligence information regarding attempts by Hamas to reassemble its terrorist infrastructure and operatives in the area".
It happened after locals were instructed to flee to Gaza City's western region.Along with this, the IDF stated that it was conducting operations to "eliminate terrorists and dismantle terrorist infrastructure" in the Zeitoun region of eastern Gaza City.
According to Safa, Israeli shelling struck Zeitoun early on Monday.
The bombing and evacuation orders, according to UN agency Unrwa, "created more displacement and fear for thousands of families" in northern Gaza.
According to Unrwa, there was "nowhere safe to go" for the impacted population, including the approximately 360,000 people who had left Rafah in the last week.
Israel has maintained that it cannot win the war in Gaza without capturing Rafah and destroying the last few Hamas units. The conflict has lasted for seven months. However, the UN and Western nations have cautioned that a full-scale attack could result in a large number of civilian deaths and a humanitarian catastrophe.
Since the IDF announced last Monday that it was starting a "precise operation against Hamas" in eastern Rafah, there have been scenes of desperation in Rafah.
Flyers directing people to leave more eastern neighborhoods—including those near the city center—were dropped off on Saturday.
Based in western Rafah, Scott Anderson, deputy director of Unrwa for Gaza, told the BBC on Monday that the Israeli operation now covered the old town and reached "about a third of the way across Rafah."
He reported that the battle has disrupted the operations of hospitals and numerous Unrwa facilities in the Rafah refugee camp, including a primary healthcare center. He claimed to have heard explosions and air strikes. Four individuals, including a child, were reportedly murdered on Monday in an Israeli airstrike on a house in the Brazil neighborhood, which is located directly southeast of the camp, according to Palestinian media.
Additionally, the military branch of Hamas claimed to have attacked Israeli forces east of Rafah.
Concerning the possibility that the Israeli operation would soon turn into a full-scale offensive, many of the individuals seeking sanctuary in central and western districts that are not under evacuation orders have also been departing.
Mother-of-two Ghada el-Kurd told the BBC on Monday that this was her eighth displacement during the conflict and that she had just gone to Deir al-Balah in Gaza's Middle Area.
The woman claimed that Deir al-Balah's streets were "full of sewage" and that the devastation of the infrastructure and housing were "huge, not like Rafah". She continued: "I'm lucky enough to have a home, but most other people are living in tents and are [suffering from] the heat, a lack of water and a lack of food."
Deir al-Balah is included in the "extended humanitarian area" declared by the IDF, which extends northward from the al-Mawasi coastal strip to Khan Younis and the Middle Area of Gaza.
While field hospitals, tents, and relief supplies are what the IDF has promised the refugees to find there, Mr. Anderson of Unrwa claimed it lacks the requisite infrastructure.
He clarified that "everything that people have access to has to be trucked in... that includes food, water, and moving solid waste" in al-Mawasi.
"It's somewhat comparable for those who are moving to Khan Younis... That is still getting better from the recent Israeli operation a few months back." Additionally, Mr. Anderson pleaded with Israel and Hamas to consent to the establishment of a "fixed corridor" that would enable UN trucks to enter and exit the neighboring Kerem Shalom border crossing with Israel in a safe manner. This crossing is a crucial point of entry for aid.
Following a four-day closure due to rocket fire from Hamas that resulted in the deaths of four Israel troops, Israel said last Wednesday that the crossing was reopened. However, the UN claimed that because of the fighting in eastern Rafah, it was extremely risky to deliver aid.
Since Israeli forces fully seized control of the Palestinian side last Tuesday, the Rafah border crossing with Egypt has also been closed.
Hamas charged Israel of "escalating their brutal massacres in various areas of Palestine" in a statement released on Sunday the Gaza Strip.
In response to Hamas' cross-border raid on southern Israel on October 7, which resulted in around 1,200 deaths and the kidnapping of 252 persons, Israel began a military campaign in Gaza to eliminate the organization.