Israeli tanks have returned to parts of northern Gaza they had left last week, residents have said, reigniting some of the most intense fighting since the New Year when Israel announced it was scaling back its operations there.
Massive explosions could be seen over northern areas of Gaza from across the border with Israel - a rarity over the past two weeks after Israel announced a drawdown of forces in the north as part of a transition to smaller, targeted operations.
The rattle of gunfire reverberated across the border through the night. In the morning, contrails snaked through the sky as Israel's Iron Dome defences shot down rockets fired by militants across the fence, proof they retain the capability to launch them, despite more than 100 days of war.
Israel said its forces had killed dozens of Hamas fighters overnight in clashes in Beit Lahiya on Gaza's northern edge. Gaza health authorities said the last 24 hours of Israeli bombing had killed 158 people in the Palestinian enclave, raising their toll for the war, now in its fourth month, to 24,285, with thousands more bodies feared lost in the rubble.


Israel launched the war to eradicate Hamas after militants stormed across the border fence on 7 October, killing 1,200 people and capturing 240 hostages. The war has driven nearly all Gazans from their homes, some several times, and caused a humanitarian crisis, with food, fuel and medical supplies running low.
Under US pressure to reduce civilian casualties, Israel had said it was transitioning from a full-scale ground assault to targeted operations against the Hamas militants that control the enclave.
It began that shift with a pullback in the north. Defence Minister Yoav Gallant also said yesterday that the more recent ground assault in the south was drawing to a close.
But any path toward de-escalating the war still seems remote, with Israel saying it will not rest until Hamas is destroyed, and the militants showing no sign of losing the ability to resist.
Israel Ziv, a retired general who formerly commanded Israeli forces in Gaza, said that ten to 15 percent of Hamas' pre-war rocketry corps of some 1,000 personnel were believed to be still alive, with some 2,000 rockets left to be fired.
However, Mr Ziv said, Israeli forces had by now established "extensive control" in Gaza, meaning they could "manoeuvre freely", except in Rafah, Deir al-Balah and Nusseirat, the launch point of Tuesday's rocket salvo.

Medical supplies
Qatar's foreign ministry spokesperson has announced the success of a Qatari mediation in cooperation with France in reaching an agreement between Israel and Hamas where medication and humanitarian aid is to be delivered to civilians in Gaza in exchange of delivering medications needed for Israeli captives in Gaza.
Medications and aid will leave Doha tomorrow to the Egyptian city of Arish in preparation to their transport into Gaza, the foreign ministry spokesperson Majed Al Ansari said.
Meanwhile, some of the hundreds of thousands of residents who fled the north earlier in the war had begun returning last week to bombed-out areas where the Israelis had withdrawn. But residents who spoke to Reuters said the abrupt resurgence of fighting in the north would now halt plans to try to go home.
"We almost planned to return to our house in Nazla, east of Jabalia, but thank God we didn't. This morning people living nearby arrived here and told us the tanks pushed back there," said Abu Khaled, 43, a father of three now living with relatives in severely damaged Gaza City.
"The sounds of bombing from the tanks, from the planes didn't stop all night. It reminded us of the first day of the ground incursion."
Israeli forces have fought their way to the centre of Gaza's main southern city of Khan Younis, and into towns north and east of the central city of Deir al-Balah.
Israeli commando forces carried out targeted raids in Khan Younis to take out militant infrastructure, including offices of several senior regional Hamas commanders, the military said.
The Gaza war has inflamed tensions across the region, including in the Red Sea, where the Iran-aligned Houthi movement that controls most of Yemen has been attacking commercial ships. The route is used by 15% of world shipping. The group says it is targeting vessels linked to Israel in solidarity with Gaza.

The United States and Britain responded by bombing Yemen to prevent what they called a threat to global commerce.
The latest ship to be attacked, a Malta-flagged, Greek-owned bulk carrier, sustained minor damage when it was hit with a missile in the Red Sea. No injuries were reported.
Defence Minister Gallant's announcement yesterday that the major ground offensive in the south would end soon raises the question of whether the Israelis will still try to advance into remaining areas they have yet to enter.
Most of Gaza's 2.3 million people are now crowded into those few areas, including Deir al-Balah and Rafah, which is located on the southern edge of the Strip bordering Egypt.
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In Khan Younis, Zaher Abu Zarifa wept and cradled a black plastic body bag holding his seven-year-old son Saif, one of at least eleven bodies brought out at a hospital morgue.
The boy was killed by a missile while playing on a bicycle by a school gate, his father said.
Later, by a small freshly dug grave, a gravedigger unzipped the bag so the father could kiss the boy's face, then zipped itback up, took the boy and gently laid him in the ground.
"Forgive me, my son. I could not protect you," the father repeated. "Forgive me, my son. I could not protect you."