When war erupted in Gaza, Palestinian artists had only one way to share their work expressing the harrowing reality of the conflict: having it smuggled out of the besieged territory.

For six months, they handed over paintings and other artworks to people leaving Gaza through its Rafah border crossing with Egypt until Israeli ground forces closed it in May when they took control of the frontier.

"The paintings document the brutality of war and massacres... carrying pain and sorrow, but also embodying an unwavering resolve," said Mohammad Shaqdih.

Arab and Muslim leaders demanded on Monday that Israel withdraw from occupied Palestinian territories as a precondition for regional peace, while denouncing "shocking" Israeli crimes in war-ravaged Gaza.

A summit meeting in the Saudi capital Riyadh gave the Arab League and the Organisation of Islamic Cooperation's 57 nations a chance to speak with one voice on turmoil engulfing the region, more than a year into the Israel-Hamas war in the Gaza Strip.

Israel has urged fans to avoid Thursday's France-Israel football tie, which authorities fear could become a flashpoint following violence in Amsterdam surrounding a match involving an Israeli team.

Despite a large police presence and the expected attendance of French President Emmanuel Macron, Israeli officials on Sunday warned fans to stay away because of fears they could be targeted.

A right-wing Jewish group has nevertheless announced a rally ahead of the Nations League tie.

The White House will spend its remaining $6 billion of Ukraine funding before Donald Trump's presidential inauguration in January, National Security Advisor Jake Sullivan said Sunday, warning of the global risks of ending US support for Kyiv.

Sullivan said President Joe Biden is expected to go over top foreign policy issues when he meets with President-elect Trump Wednesday in the Oval Office.

Osama Ahmed's life took a dramatic turn one night in October when the small boat that was to carry him and his father to the English coast sank shortly after setting out from France.

The 20-year-old Syrian was rescued but when he woke up in hospital and asked about his dad nobody knew anything.

Since that moment, Osama has been looking frantically for his father with whom he had hoped to start a new life in Britain.

Beyond the tragically long list of deaths in the Channel of migrants trying to cross, another statistic is also growing fast: Missing people.

The Alloush family would have been getting ready for breakfast on Sunday morning when an Israeli strike hit their home in northern Gaza, according to a distraught relative.

The blast blew dozens of Palestinians into pieces, Abdullah al-Najjar said from the scene of the attack in Jabalia.

Many children were among them, according to rescuers.

At around six o'clock, "there was a very huge explosion... When we arrived here, all the bodies were torn apart," Najjar said.

From a bunker in Metula, a town in Israel's bombarded north, David Azoulai showed off the remnants of burnt-out ordnances as if they were artifacts from a museum.

"The rockets are from the east... Iran, Russia and North Korea," he said, handling the mishappen shrapnel of projectiles produced there.

But the shards -- from anti-tank missiles, rockets and even parts of a sophisticated drone -- were not precious antiquities, but artillery fired over the past year by Hezbollah, the Iran-backed Shiite Islamist group, from southern Lebanon.

Israeli air strikes killed dozens of people in Lebanon and Gaza Sunday, rescuers and authorities said, ahead of a US deadline for improved aid delivery to the Palestinian territory.

Another strike south of the Syrian capital Damascus killed nine people including a Hezbollah commander, a war monitor said.

Rescuers in the Gaza Strip said 13 children were among 30 people killed by Israeli strikes in the territory's north.

The first hit a house in Jabalia, killing at least 25 people including 13 children and injuring more than 30, Gaza's civil defence agency said.

At least 41 people were killed in Israeli strikes across Lebanon on Sunday, including 23 in a raid north of the capital Beirut, the health ministry said.

Israel, at war with Lebanon's Hezbollah since late September, has intensified its air campaign against the Iran-backed movement in recent days, especially in the country's south and the southern suburbs of Beirut.

After jihadists jailed him in 2014, Iraqi religious scholar Muhammad al-Attar said he would sometimes pull his prison blanket over his head to cry without other detainees noticing.

Islamic State group extremists arrested Attar, then 37, at his perfume shop in Mosul in June 2014 after overrunning the Iraqi city, hoping to convince the respected community leader to join them.

But the former preacher refused to pledge allegiance, and they threw him into prison where he was tortured.