At least 70 Palestinians have been killed and more than 200 wounded in Israel’s latest assault on the Khan Younis area in southern Gaza as Palestinians fleeing Israeli tank shelling and air strikes have described the situation as “doomsday”.

“Due to the Israeli occupation’s attacks and massacres in Khan Yunis governorate from the early hours of this morning until now, 70 people have been martyred and more than 200 wounded,” Gaza’s Ministry of Health said in a statement on Monday, adding that the dead included women and children.

Residents of the densely built-up area of southern Gaza said the tanks advanced for more than 2km (1.2 miles) into Bani Suheila on the eastern edge of Khan Younis, forcing residents to flee under fire. Israel’s third assault on the southern city began shortly after Palestinians were ordered to leave the area, which has been designated as “safe zone”, giving little time for people to find safety.

Palestinians were killed by Israeli tank salvoes in Bani Suheila and other towns just east of Khan Younis, and the area was also bombarded by air, according to medics.

“It is like doomsday,” one resident who identified himself only as Abu Khaled told the news agency Reuters via a chat app. “People are fleeing under fire. Many are dead and wounded on the roads.”

The Nasser Medical Complex in Khan Younis has been overwhelmed with patients, and the wounded are being treated on the floor. Medics at the medical facility said the situation was “out of control”.

Palestinians displaced

Earlier on Monday, the Israeli military ordered Palestinians in al-Mawasi, which is located along the Gaza coast between the cities of Khan Younis and Rafah, to leave.

Israel justified its new operation there, saying Palestinian fighters have been using the area to launch attacks on Israeli forces. In a statement, it urged people to relocate from eastern Khan Younis to the west of the “adjusted humanitarian area of al-Mawasi”.

However, many Palestinians are hesitant to join the swelling tent camps in al-Mawasi, declared a humanitarian zone in May, after a recent attack on the area killed at least 92 people and wounded more than 300, according to figures from the Health Ministry. That attack caused global outrage.

Al Jazeera’s Tareq Abu Azzoum, reporting from Deir el-Balah in Central Gaza, said the situation is “deteriorating in the eastern areas of Khan Younis city”, where the population “has returned to live in the remnants of their destroyed houses – and, again, the military has announced that they are starting a new incursion”.

“But that happened in a very short period of time, and they started to bombard residential houses. People were inside. Later, the military started to drop leaflets [to order an evacuation] in the eastern areas of Khan Younis,” he said.

Some families fled on donkey carts and others on foot, carrying mattresses and other belongings.

Palestinians, the United Nations and international relief agencies have said there is no safe place left in Gaza.

Hospitals overwhelmed

The Palestinian Red Crescent Society said two of its clinics located in eastern Khan Younis had been knocked out of operation because of the new Israeli offensive.

At Nasser Medical Complex, some people stood outside the morgue to bid farewell to dead relatives.

“We are tired. We are tired in Gaza. Every day our children are martyred – every day, every moment,” Ahmed Sammour, who lost several relatives in bombings of eastern Khan Younis, told Reuters.

“No one told us to evacuate. They brought four floors crashing down on civilians, … and the bodies they could reach, they brought to the refrigerator [morgue],” Sammour added.

Hamas denounced the attack, stating that it would not deter Palestinians from remaining “steadfast in their land”.

“We call upon the international community and the United Nations to urgently intervene to stop the systematic Zionist killing of our people, who are facing a genocide,” the group said in a statement on its Telegram channel.

At least 39,006 people have been killed and 89,818 injured since Israel launched its war on Gaza in October.

The death toll in Israel from Hamas-led attacks on October 7 is estimated at 1,139, and dozens of people are still being held captive in Gaza.