Israel's military said it conducted a strike in Syria on Tuesday in response to incoming fire from across the demarcation line, after reports of Israeli shelling killing five people in southern Syria.

EU foreign policy chief Kaja Kallas warned on Monday during a visit to Jerusalem that Israeli strikes on Syria and Lebanon threatened to worsen the situation.

"Military actions must be proportionate, and Israeli strikes into Syria and Lebanon risk further escalation," Kallas said at a joint news conference with Israeli Foreign Minister Gideon Saar.

The Palestinian Prisoners Club non-governmental organization said Monday that a Palestinian 17-year-old died in Israel's Megiddo prison in unknown circumstances.

In a statement, the NGO announced "the death of Walid Khaled Abdullah Ahmad (17 years old), a minor detainee from the town of Silwad, east of Ramallah, in Megiddo Prison" in Israel, adding he was the 63rd Palestinian to die in Israeli jails since the start of the war in Gaza.

Israel again is fighting a war on multiple fronts, but a battle is also brewing inside the country.

Tens of thousands of Israelis have joined anti-government protests in recent days. A former Supreme Court chief justice has warned of civil war. And experts are saying a constitutional crisis could be on the horizon if the Israeli government moves ahead with plans to fire top legal and security officials.

U.S. airstrikes targeting Yemen's Houthi rebels pounded sites across the country into Monday, with the group saying the one attack in the capital killed at least one person and wounded more than a dozen others

The American strikes entered its 10th day without a sign of stopping, part of a campaign by U.S. President Donald Trump targeting the rebel group that threatens maritime trade and Israel while also trying to pressure Iran, the Houthis' main benefactor.

Israel's military struck the largest hospital in southern Gaza on Sunday night, killing two people, wounding others and causing a large fire, the territory's Health Ministry said.

The strike hit the surgical building of Nasser Hospital in the city of Khan Younis, the ministry said, days after the facility was overwhelmed with dead and wounded when Israel resumed the war in Gaza last week with a surprise wave of airstrikes.

Israeli officials said an attacker in a vehicle ran over several people at a bus stop in northern Israel before opening fire, killing a man in his 70s.

Police said officers shot and killed the attacker, whose identity was not immediately disclosed. Police referred to it as a terrorist attack, indicating they believe the assailant was a Palestinian militant.

Israeli strikes across the Gaza Strip killed at least 25 Palestinians, including several women and children, according to three hospitals Monday. The strikes came nearly a week after Israel ended its ceasefire with Hamas with a surprise bombardment that killed hundreds.

Meanwhile, officials say Egypt has introduced a new proposal to try and get the Israel-Hamas ceasefire back on track.

Israel's military said early on Sunday it had intercepted a missile launched from Yemen after air raid sirens sounded in several areas across the country.

Israel's opposition leader has called for a general strike if Prime Minister Benjamin Netanyahu refuses to obey a Supreme Court decision freezing the government's dismissal of the internal security chief.