People carry their belongings while walking on the rubble, after an Israeli strike, as they flee Lebanon due to ongoing hostilities between Hezbollah and Israeli forces, at Masnaa border crossing with Syria, in Lebanon, Friday. (Reuters-Yonhap)

BEIRUT (AP) -- Israel carried out a series of massive airstrikes overnight, hitting suburbs of Beirut and cutting off the main border crossing between Lebanon and Syria for tens of thousands of people fleeing Israeli bombardment.

The blasts in Beirut's southern suburbs sent huge plumes of smoke and flames into the night sky and shook buildings kilometers away in the Lebanese capital. The Israeli military did not immediately comment on what the intended target was, and there was no information immediately available on casualties. Lebanon’s state-run National News Agency reported there were more than 10 consecutive airstrikes in the area.

The Israeli military said Friday that a strike in Beirut the day before killed Mohammed Rashid Skafi, the head of Hezbollah’s communications division. The military said in a statement that Skafi was “a senior Hezbollah terrorist who was responsible for the communications unit since 2000” and was “closely affiliated” with high-up Hezbollah officials.

Thursday’s strike along the Lebanon-Syria border, about 50 kilometers east of Beirut, led to the closure of the road near the busy Masnaa Border Crossing.

Israel said it had targeted the crossing because it was being used by Hezbollah to transport military equipment across the border. It said fighter jets had struck a tunnel used it to smuggle weapons from Iran and other proxies into Lebanon.

Hezbollah is believed to have received much of its weaponry from Iran via Syria. The group has a presence on both sides of the border, a region where it has been fighting alongside Syrian President Bashar Assad’s forces.

Associated Press video footage showed two huge craters on each side of the road. People disembarked cars unable to pass the site of the strike, carrying bags of their possessions as they crossed on foot.

Tens of thousands of people fleeing war in Lebanon have crossed into Syria over the past two weeks there.

The new wave of strikes came after Israel warned people to evacuate communities in southern Lebanon, including but also beyond an area that the United Nations declared a buffer zone after Israel and Hezbollah fought a monthlong war in 2006.

Israel launched a ground incursion into Lebanon on Tuesday and its forces have been clashing with Hezbollah militants in a narrow strip along the border. A series of attacks before the incursion killed some of the group's key members, including longtime leader Hassan Nasrallah.

Iran’s Foreign Minister, Abbas Araghchi, arrived Friday in Beirut, where he was expected to discuss the war between Israel and Hezbollah with Lebanese officials.

Araghchi’s visit to Beirut came three days after Iran launched at least 180 missiles into Israel, the latest in a series of rapidly escalating attacks that threaten to push the Middle East closer to a regionwide war.

Iran is Hezbollah’s main backer and has sent weapons and billions of dollars to the group over the years.

In the Iranian capital, Tehran, the country’s Supreme Leader Ayatollah Ali Khamenei led Friday prayers and delivered a speech where he praised the country’s recent missile strike on Israel and said Iran was prepared to conduct more strikes if needed.

He spoke to thousands of people at the capital’s main prayer site, the Mosalla mosque, which was decorated with a huge Palestinian flag.

Friday's strike at the border crossing was the first time this major border crossing has been cut since the beginning of the war. Lebanese General Security recorded 256,614 Syrian citizens and 82,264 Lebanese citizens crossing into Syrian territory between Sept. 23 -- when the Israel launched a heavy bombardment of southern and eastern Lebanon -- and Sept. 30.

There are half a dozen border crossings between the two countries and most of them remain open. Lebanon’s minister of public works said all border crossings between Lebanon and Syria work under the supervision of the state.

Israel and Hezbollah have traded fire across Lebanon's southern border almost daily since the day after Hamas’ cross-border attack on Oct. 7, 2023, in which the militants killed 1,200 Israelis and took 250 others hostage.

Meanwhile, the Israeli army said it carried out a strike Thursday in Tulkarem, a militant stronghold in the occupied West Bank, in coordination with the Shin Bet internal security service.

The Palestinian Health Ministry said 18 people were killed in an Israeli strike on a refugee camp there.

Violence has flared across the Israeli-occupied territory since the Israel-Hamas war erupted in October 2023. Tulkarem and other northern cities have seen some of the worst violence.

Israel declared war on Hamas in the Gaza Strip in response to their Oct. 7 attack. More than 41,000 Palestinians have since been killed in the territory, and just over half the dead have been women and children, according to local health officials. Nearly 2,000 people have been killed in Lebanon in that time, most of them since Sept. 23, according to the Lebanese Health Ministry.