The Israeli military says it has struck the Lebanese capital of Beirut, targeting the militant commander allegedly behind the deaths of 12 children and teenagers in Golan Heights.
The strike comes days after a rocket strike from Lebanon killed the 12 youths. Israel blames the Hezbollah militant group, which has denied any role in the attack.
Britain’s Foreign Secretary David Lammy has warned thousands of UK nationals will risk “becoming trapped in a warzone” if they fail to leave Lebanon.
A loud blast was heard and a plume of smoke could be seen rising above the southern suburbs - a stronghold of Lebanese armed group Hezbollah - at around 7.40pm (1640 GMT), a Reuters witness said.
"The IDF carried out a targeted strike in Beirut, on the commander responsible for the murder of the children in Majdal Shams and the killing of numerous additional Israeli civilians," the Israeli Defence Forces said in a statement.
It said it had issued no new instructions for civil defence in Israel following the strike. A senior Lebanese security source said the commander's fate remained unclear.
Lebanon's state-run national news agency said an Israeli strike had targeted the area around Hezbollah's Shura Council in the Haret Hreik neighbourhood of the capital.
Beirut has been on edge for days ahead of an anticipated Israeli attack in retaliation for a strike on the Druze village of Majdal Shams in the Israeli-occupied Golan Heights that killed a dozen youngsters.
Israel and the United States have blamed Hezbollah for the attack. Hezbollah has denied responsibility.
Britons risk ‘becoming trapped in warzone’
David Lammy issued a one-word message to British nationals in the Levantine nation: “Leave.”
He confirmed Prime Minister Sir Keir Starmer had chaired a Cobra emergency meeting on Tuesday amid tensions in the Middle East.
The meeting followed a rocket strike which killed 12 young people on a football field in the mainly Druze town of Majdal Shams.
Israel has said the Iranian-backed Hezbollah was responsible for the attack on Saturday evening, but Hezbollah denied a role in the strike.
Israel’s prime minister, Benjamin Netanyahu, vowed retaliation against the group when he wrote on X, formerly Twitter: “Our response will come, and it will be severe.”
Mr Lammy told MPs: “On July 27, Hezbollah launched a series of rockets into northern Israel and the occupied Golan Heights.
“Tragically in Majdal Shams, one strike killed at least 12 civilians, young people, one just 10 years old, who were playing football.
“I extend my deepest sympathies to their families and to the Druze community as they grieve for their loved ones.
“The Government is unequivocal in condemning this horrific attack and calling on Hezbollah to cease their rocket strikes. This atrocity is a consequence of indiscriminate firing, paying no heed at all to civilian life.
“This attack is part of an intensifying pattern of fighting around the Israeli-Lebanese border. For months now, we’ve been teetering on the brink.
“The risk of further escalation and regional destabilisation is now more acute than ever.”
Mr Lammy said he had spoken to the Lebanese prime minister, Najib Mikati, in his first week in office, and again on Monday, to express his “concern”, and had previously met with Mr Netanyahu.
Turning to UK nationals in Lebanon, Mr Lammy said: “The Prime Minister chaired a Cobra meeting this morning and I’m working with Foreign Office consular teams to make sure we are prepared for all scenarios, but if this conflict escalates, the Government cannot guarantee we’ll be able to evacuate everyone immediately.
“People may be forced to shelter in place and history teaches us that in a crisis like this one, it is far safer to leave while commercial flights are still running rather than running the risk of becoming trapped in a warzone.
“My message, then, to British nationals in Lebanon is therefore quite simple: leave.”
Shadow foreign secretary Andrew Mitchell said there is a risk of further escalation across the Blue Line – the border demarcation between Lebanon and Israel.
He said: “We don’t want to see a widening of this painful conflict and the opening of a new front would be in nobody’s interest. If we’re to avoid it, all involved must show restraint.”
In response to Mr Mitchell’s question about the estimated number of UK nationals in Lebanon, Mr Lammy said: “We have begun the registration scheme that allows UK nationals to register their presence in Lebanon so we know where they are.
“Our estimation is that about 16,000 UK nationals are in the region, but of course asking people to register does enable us to know who is there and, of course, we urge people to leave on the many commercial flights that are available currently from Lebanon, to leave and make their way to Europe and back home.”