Israel-Gaza-Lebanon live updates: 87 killed in Israeli strikes on Beit Lahia

At least 160 rockets fired by Hezbollah crossed from Lebanon into Israel on Sunday, Israel Defense Forces said, as sirens sounded across northwest Israel, including Haifa, the country's third largest city.

The IDF said the barrage of rockets occurred around 3 p.m. local time and that 30 projectiles crossed into Israel three minutes after they were launched.

No injuries or casualties have been reported. The IDF said some projectiles fell in the north and fire services were working to extinguish the fires that erupted from the attack.

-ABC News' Jordana Miller

Doctors Without Borders is calling on Israeli forces to "immediately stop their attacks on hospitals in north Gaza," alleging that six of its staff are trapped in a Jabalia hospital without power and one was killed from shrapnel injuries that could not be adequately treated.

In a statement Saturday, the agency -- also known as MSF or Médecins Sans Frontières -- referred to the Hamas-run Ministry of Health in Gaza and other medics on the ground as reporting that Israeli forces are besieging the three main hospitals in northern Gaza. MSF said 350 patients are trapped inside the hospitals, including patients who are pregnant and just underwent surgery.

"The ever-worsening escalation of violence and nonstop Israeli military operations that we have been witnessing over the past two weeks in northern Gaza have horrifying consequences,” MSF's emergency coordinator in Gaza said, adding, "This is purely and simply a collective punishment imposed on Palestinians in Gaza, who must choose between being forcibly displaced from the north or killed. We fear that this will not stop."

There was no immediate comment from the Israel Defense Forces.

-ABC News' Victoria Beaule

Israel killed 87 Palestinians in a Saturday night bombardment of Beit Lahia in northern Gaza, the Hamas-run government media office in the strip reported.

Around 40 people were injured in the attacks, with many others reported missing and believed to be under rubble, officials said. Aid teams were working to reach the victims, the office added.

The Israel Defense Forces issued a statement disputing the media office's report.

The IDF claimed in a post on X that the toll was "exaggerated" and does not align with its analysis.

-ABC News' Samy Zyara, Jordana Miller and Somayeh Malekian

The Israel Defense Forces said it identified around 70 projectiles fired into Israel from Lebanon on Sunday morning.

The launches set off sirens in the Western Galilee and Upper Galilee areas, the IDF wrote in a statement posted to X.

Some projectiles were intercepted, the IDF said.

"Israel Fire and Rescue Services are operating to extinguish numerous fires that were ignited in the area as a result of the attack," the IDF wrote.

-ABC News' Jordana Miller