he World Health Organization said 28 healthcare workers had been killed in Lebanon in the previous 24 hours. WHO chief Tedros Adhanom Ghebreyesus also said flight restrictions meant the agency would not be able to deliver a large planned shipment of trauma and medical supplies to Lebanon on Friday.
Hezbollah says it has repelled several land operations by Israeli troops, including with ambushes and in direct clashes.
Lebanese security sources say Israeli troops have entered Lebanese territory and been pushed back several times in recent days, without setting up a permanent presence.
Hezbollah said it killed 17 Israeli military personnel in combat in southern Lebanon on Thursday, citing its field and security sources. Israeli forces did not comment on the claim.
Israel's military on Thursday reported the death of one soldier. On Wednesday it announced its deadliest day in a year of clashes with Hezbollah with the deaths of eight soldiers.
The Lebanese army said two soldiers were killed by Israeli strikes in separate incidents in south Lebanon on Thursday, one in an attack on a military post and another in a strike on a rescue mission with the Lebanese Red Cross.
The army said that it returned fire when the military post was struck, a rare development for a force that has historically stayed on the sidelines of major conflict with Israel.
BEIRUT UNDER ATTACK
In Beirut's southern suburb known as Dahiye, a dense neighbourhood where Hezbollah holds sway, several explosions were heard on Thursday and several large plumes of smoke were rising after heavy Israeli strikes.
Overnight, Israel bombed central Beirut in an attack the Lebanese health ministry said killed nine people.
Israel's military said it struck 15 Hezbollah targets in Beirut on Thursday, including weapons sites and intelligence targets.
Reuters journalists reported hearing a heavy blast after a building in the district of Bachoura was targeted a few hundred meters from parliament, the closest an Israeli strike has come to the central downtown district.
A Hezbollah-linked civil defence group said seven of its staff, including two medics, were killed in the Beirut attack.
Israel also said it struck a municipality building in the southern Lebanese town of Bint Jbeil, killing 15 Hezbollah members and destroying many weapons.
A number of countries were evacuating citizens from Beirut as governments worldwide urged their citizens to get out.
IRAN'S WARNINGS
After Iran's missile attack on Israel on Tuesday, Israeli Prime Minister Benjamin Netanyahu vowed that Iran would pay, and Washington said it would work with its longtime ally to ensure Iran faced "severe consequences."
Iranian President Masoud Pezeshkian, speaking in Doha, said on Thursday Tehran would be ready to respond.
"Any type of military attack, terrorist act or crossing our red lines will be met with a decisive response by our armed forces," he said.
Qatar's Emir Sheikh Tamim bin Hamad Al-Thani urged
serious ceasefire efforts to stop what he called Israel's aggression.
The Lebanese border front opened after Hezbollah fired missiles at Israel a year ago in support of Hamas in its war with Israel in Gaza. Iran's other regional allies - Yemen's Houthis and armed groups in Iraq - have also launched attacks in the region in support of Hamas