Hours later, Hamas fired three rockets at Israel without causing casualties, in the first such attack since Israel ended their ceasefire with a surprise bombardment of Gaza on Tuesday.
The Israeli military, meanwhile, restored a blockade on northern Gaza, including Gaza City, that it had maintained for most of the war.
It warned residents against using the main highway to enter or leave the north and said only passage to the south would be allowed on the coastal road.
It also announced an additional ground operation in northern Gaza near the already largely destroyed town of Beit Lahiya, where strikes have killed dozens in the past 24 hours.
Hundreds of thousands of Palestinians returned to what remains of their homes in the north after a ceasefire took hold in January.
Israel resumed heavy strikes across Gaza on Tuesday, shattering the truce that had facilitated the release of more than two dozen hostages.
Israel blamed the renewed fighting on Hamas because the militant group rejected a new proposal that departed from their signed agreement.
The Trump administration, which took credit for helping to broker the ceasefire, has voiced full support for Israel.
More than 400 Palestinians were killed on Tuesday alone, mostly women and children, according to Gaza's health ministry.
The military said three rockets were fired out of Gaza on Thursday, with one intercepted and two falling in open areas.
Hamas claimed the attack and said it had targeted Tel Aviv.
Earlier, the military said it intercepted a missile launched by Yemen's Iran-backed Houthi rebels overnight before it reached Israeli airspace, as air raid sirens and exploding interceptors were heard in Jerusalem. No injuries were reported.
It was the second such attack since the United States began a new campaign of air strikes against the rebels earlier this week.
The Israeli military said it had struck dozens of militant targets across Gaza overnight and into Thursday, hitting dozens of fighters as well as military structures.
On Wednesday, Israeli ground troops advanced in Gaza for the first time since the ceasefire took hold in January, seizing part of a corridor separating the northern third of the territory from the south.
The announcement about passage to the south indicated troops will soon retake full control over what is known as the Netzarim corridor, stretching from the border to the Mediterranean Sea.
Israel, which has also cut off the supply of food, fuel and humanitarian aid to Gaza's roughly two million Palestinians, has vowed to intensify its operations until Hamas releases the 59 hostages it holds - 35 of whom are believed dead - and gives up control of the territory.
The Trump administration, which took credit for brokering the ceasefire, says it fully supports Israel.
Hamas has said it will only release the remaining hostages in exchange for a lasting ceasefire and a full Israeli withdrawal from Gaza, as called for in the ceasefire agreement they reached in January after more than a year of mediation by the United States, Egypt and Qatar.
Hamas, which does not accept Israel's existence, says it is willing to hand over power to the Western-backed Palestinian Authority or a committee of political independents but will not lay down its arms until Israel ends its decades-long occupation of lands the Palestinians want for a future state.
Gaza's health ministry said the overnight strikes killed at least 85 people, mostly women and children, and a total of 592 people had been killed in Israeli strikes since Tuesday.
The war began when Hamas-led militants stormed into southern Israel on October 7, 2023, killing some 1200 people and taking 251 hostage.
Most of the hostages have been freed in ceasefire agreements or other deals. Israeli forces have rescued eight living hostages and recovered the bodies of dozens more.
Israel's retaliatory offensive, among the deadliest and most destructive in recent history, has killed nearly 49,000 Palestinians, according to the Gaza health ministry.
It does not say how many were militants, but says more than half of those killed were women and children.
Israel says it has killed about 20,000 militants, without providing evidence.
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