A blast caused by a gas leak at a coal mine has killed at least 51 people, state media said Sunday, in one of Iran's deadliest work accidents in years.

"The number of dead workers increased to 51" in the explosion at the Tabas mine in eastern Iran, the official IRNA news agency reported, revising an earlier death toll of 30.

It said 20 more were injured.

The explosion occurred at around 9:00 pm (1730 GMT) on Saturday, when around 70 workers were present at the site in South Khorasan province, IRNA said.

The Israeli military said more than 100 projectiles were fired early Sunday from Lebanon, forcing hundreds of thousands to take cover and prompting school closures in Israel's north.

The military said that "approximately 20 projectiles were identified crossing from Lebanon" shortly before 5:00 am (0200 GMT), followed by a barrage of "approximately 85 projectiles" launched from Lebanon after 6:00 am (0300 GMT).

UAE President Sheikh Mohamed bin Zayed Al Nahyan is due Monday in Washington for a first official visit at a time of soaring tensions in the Middle East, seeking to highlight economic and technological cooperation.

Presidential advisor Anwar Gargash said the Emiratis, who want to reorient their economy away from oil and towards new technologies such as AI, were thinking "economy first, prosperity first" in their "strategic relationship" with the United States.

Israel has dealt serious blows to Hezbollah this week by targeting its communications and decimating the leadership of its elite unit, but without crushing the Lebanese group's ability to fight, observers say.

On Friday, an Israeli strike on Hezbollah's stronghold in Beirut's southern suburbs targeted a meeting of the Lebanese movement's Radwan Force, killing 16 members of the elite unit, according to a source close to the group.

Armed and masked Israeli forces raided the office of global news channel Al Jazeera in the occupied West Bank on Sunday and issued a 45-day closure order.

It was the latest salvo in a long-running feud between the Arab broadcaster and Prime Minister Benjamin Netanyahu's government which has worsened during the war in Gaza.

Since the war began on October 7 when Hamas Palestinian militants attacked Israel, Al Jazeera has aired continuous on-the-ground reporting on the effects of Israel's military campaign.

Thousands of Israelis again took to the streets of Israel's commercial hub Tel Aviv on Saturday to press for a Gaza truce deal that could free dozens of hostages.

Weekly rallies in Tel Aviv throughout the war, which was triggered by Hamas's October 7 attack, have become more critical of the Israeli government since the military announced earlier this month that six dead captives had been recovered from a tunnel in the southern Gaza Strip.

From behind a metal fence set up by security forces in southern Beirut on Saturday, local residents watched and waited as emergency personnel dug through debris, and the body count rose.

The fate of their friends and neighbours remained unclear, a day after an Israeli strike tore into Beirut's densely populated southern suburbs on Friday.

Lebanese authorities reported civilian victims in the raid Israel said targeted Hezbollah commanders.

The claws of two tracked excavators dug through the mangled concrete and metal of a flattened building.

Gaza's civil defence agency reported 21 killed in an Israeli strike on Saturday, the latest attack on a school sheltering displaced Palestinians where the Israeli military said it targeted militants.

A spokesman for the civil defence agency, Mahmud Bassal, said more than half the dead at the Gaza City school were children. According to witnesses, a group of orphans had earlier gathered at the building to receive sponsorship from a local aid group.

Iran unveiled a new ballistic missile and an upgraded one-way attack drone at a military parade on Saturday, state media said, amid soaring regional tensions and allegations of arming Russia.

Iran stands accused by Western governments of supplying both drones and missiles to Russia for use in its war with Ukraine, a charge it has repeatedly denied.

The solid-fuel Jihad missile was designed and manufactured by the aerospace arm of Iran's Revolutionary Guards and has an operational range of 1,000 kilometres (more than 600 miles), state news agency IRNA said.

Just a year after announcing that diplomatic ties with Israel were getting closer, Saudi Arabia's de facto leader has shut down talk of normalisation as the Israel-Hamas war threatens to spread.

The tougher tone from Crown Prince Mohammed bin Salman came the same day that exploding walkie-talkies killed members of Lebanon's Hezbollah movement, again raising fears of a wider war.

The Iran-backed group blamed Israel and has been exchanging fire with Israeli forces since October in support of Palestinian movement Hamas.