One of the worst mass casualty strikes on Israel in a year of war came not from dozens of Iranian ballistic missiles nor the repeated barrages of rocket fire launched by Hamas and Hezbollah. Instead, it was a single drone.

The unmanned aerial vehicle, laden with explosives, evaded Israel's multilayered air-defense system and slammed into a mess hall at a military training camp deep inside Israel, killing four soldiers and wounding dozens.

Even as attention has shifted to Lebanon, Israel is still striking the Gaza Strip more than a year after Hamas' Oct. 7 attack into southern Israel triggered the war there and set off escalations across the region.

Early on Monday, an Israeli airstrike on a hospital courtyard in the Gaza Strip killed at least four people and triggered a fire that swept through a tent camp for people displaced by the war, leaving more than two dozen with severe burns.

At least 21 people were killed in a strike on north Lebanon Monday, with the health ministry and official media reporting an Israeli raid on the Christian-majority area far from Hezbollah strongholds.

"Eighteen dead and four wounded in the strike on Aito," the Red Cross said, referring to a village in the Christian-majority Zgharta district. The National News Agency said Israel targeted a "residential apartment" in the village.

As the war between Israel and Lebanon's Hezbollah escalates, a United Nations peacekeeping force in Lebanon is increasingly in the crosshairs, with Israeli troops firing at the peacekeepers' headquarters and positions several times in the past week.

The peacekeepers belong to the 10,000-strong United Nations Interim Force in Lebanon, known as UNIFIL, who have been patrolling the border area between Lebanon and Israel for nearly 50 years.

Israel’s Shin Bet domestic security agency said Monday police had charged two Israelis on accusations that they planned to carry out an assassination at the behest of Iran.

The agency said Vladislav Victorson, 30, was approached online by a person called Mari Hossi and was instructed to carry out missions that ranged from petty vandalism to torching cars, and paid more than $5,000.

Irish Foreign Minister Micheál Martin is accusing Israel of trying to prevent the world from seeing what its troops are doing in Lebanon and Gaza, and of working to undermine the United Nations.

Asked what Israel’s aim might be in demanding that UNIFIL peacekeepers leave their bases after a series of attacks, Martin said: “essentially to drive the eyes and ears out of south Lebanon and to give itself free rein.”

An Israeli airstrike hit near an aid convoy in Lebanon, wounding a driver and lightly damaging the trucks.

The humanitarian aid, which reached Beirut on Monday, was marked with the flags of Turkey and the United Arab Emirates as well as the Red Cross insignia.

The United States will send a Terminal High Altitude Area Defense battery and troops to Israel. The Pentagon made the announcement Sunday, shortly after Iran warned Washington to keep American military forces out of Israel.

Pentagon spokesman Maj. Gen. Pat Ryder said in a statement that Defense Secretary Lloyd Austin authorized the deployment of the THAAD battery at the direction of President Joe Biden.

The European Union has condemned attacks on U.N. peacekeepers in Lebanon and rejected allegations that U.N. Secretary-General António Guterres is responsible for obstructing the Israeli army.

Sixteen EU countries are contributing to the UNIFIL peacekeeping force. EU foreign policy chief Josep Borrell said that “their work is very important. It’s completely unacceptable attacking United Nations troops.” Five peacekeepers have been wounded in attacks that struck their positions, with most blamed on Israeli forces.

A Hezbollah drone attack on an army base in central Israel killed four soldiers and severely wounded seven others Sunday, the military said, in the deadliest strike by Hezbollah since Israel launched its ground invasion of Lebanon nearly two weeks ago.

Hezbollah called the attack near Binyamina city retaliation for Israeli strikes on Beirut on Thursday that killed 22 people. It later said it targeted Israel’s elite Golani brigade, launching dozens of missiles to occupy Israeli air defense systems during the assault by “squadrons” of drones.