Lebanon's health ministry said at least 21 people died Monday in a rare Israeli strike on a northern Christian-majority village, far from Hezbollah strongholds, with DNA tests being conducted to identify body parts.
A Lebanese security official told AFP the building "housed families displaced from Lebanon's south, and was targeted shortly after a man had arrived in a car".
He requested anonymity to discuss sensitive matters.
People living near an Israeli army base hit by a Hezbollah drone strike described a loud explosion then multiple ambulances arriving, as fresh rocket fire and air raid sirens sent them rushing to shelters on Monday.
Four soldiers were killed Sunday night by a Hezbollah drone at the base in the Binyamina area -- the deadliest strike on Israeli soil since the war between Israel and the Lebanese armed group intensified last month.
Emergency services that helped transport the wounded to hospital said more than 60 were injured.
Iran said Monday it currently sees "no grounds" for its indirect talks with the United States via intermediary Oman, citing the crisis in the Middle East.
In June, Tehran said it had engaged in indirect talks with Washington via Muscat, despite the two countries having no diplomatic relations.
US news website Axios reported at the time that officials from Iran and the United States held indirect talks in Oman "on how to avoid escalating regional attacks".
Prime Minister Keir Starmer on Monday told global business leaders it was "time to back Britain", as he hosted a major summit aimed at securing much-needed funds to fuel economic growth after post-Brexit chaos.
Starmer told captains of industry that his recently elected Labour government would "rip out the bureaucracy that blocks investment" and pledged to slash red tape.
Israeli Prime Minister Benjamin Netanyahu on Monday vowed to hit Hezbollah without mercy, a day after the Iran-backed Lebanese group's deadliest strike on Israel since the start of the war in late September.
Hezbollah's drone attack on an Israeli base killed four soldiers on Sunday, while volunteer rescuers said another 60 people were injured.
"We will continue to mercilessly strike Hezbollah in all parts of Lebanon –- including Beirut," Netanyahu said on a visit to the base near Binyamina, south of Haifa.
The UN agency for Palestinian refugees, which Israel has vowed to ban on Thursday, is seen by some as an irreplaceable humanitarian lifeline in Gaza, and as an accomplice of Hamas by others.
The United Nations Relief and Works Agency for Palestine Refugees (UNRWA) has for more than seven decades provided essential aid and assistance to Palestinian refugees.
UNRWA chief Philippe Lazzarini has described the organisation as "a lifeline" for nearly six million Palestinian refugees under its charge.
UN Secretary-General Antonio Guterres on Sunday denounced attacks that have injured several peacekeepers in southern Lebanon, his spokesman said, as Israeli forces move against Hezbollah militants.
"UNIFIL personnel and its premises must never be targeted," Stephane Dujarric said, referring to the blue-helmeted international force. "Attacks against peacekeepers are in breach of international law...(and) may constitute a war crime."
The Iraqi government is struggling to rein in powerful pro-Iran factions that risk pulling Iraq into a regional war, as fighting in Gaza and Lebanon threatens to spread further.
The Islamic Resistance in Iraq, a loose alliance of armed groups backed by Iran, has claimed several drone attacks targeting Israel in recent months, which they say are in support of their Palestinian ally Hamas in the Gaza Strip.
While most of the attacks have been intercepted, a drone strike last week that Israel said was launched from Iraq killed two Israeli soldiers.
Palestinians trapped in northern Gaza, where Israel is battling Hamas, are grieving for loved ones lost to the relentless bombardment while also facing food shortages and a medical crisis.
Hospitals are running out of supplies and emergency responders are often unable to reach people trapped under debris.
"The number of dead is high, and people are under the rubble, missing," Muhammad Abu Halima, a 40-year-old Jabalia resident, told AFP.
"For over a week there has been no hope, no water and no means of life," he said.
Rubble and plumes of smoke were all that was left Sunday of Nabatiyeh marketplace, once the beating heart of the city in south Lebanon where Israel has intensified its bombardment.
Late Saturday, state media reported Israeli air strikes on the marketplace of the major city some dozen kilometres (miles) from the border with Israel.
The health ministry said the attack wounded eight people. Israel's military has not commented.
"It's as if an earthquake shook the Nabatiyeh market. It's been completely destroyed," said resident Tarek Sadaka.
