Israeli forces killed two Palestinians in the occupied West Bank on Monday during what the army called an attempted car-ramming attack on soldiers carrying out an arrest operation.

The deaths came during one of the worst periods of unrest in years in the West Bank where Israeli forces have conducted near daily raids since March.

The latest deaths were in the central West Bank, at the Jazalone refugee camp near Ramallah, where the army said it "apprehended an individual suspected of terror activity".

Iran's supreme leader Ayatollah Ali Khamenei on Monday accused arch-foes the United States and Israel of fomenting the wave of nationwide unrest sparked by outrage over the death of Mahsa Amini.

"I say clearly that these riots and the insecurity were engineered by America and the occupying, false Zionist regime, as well as their paid agents, with the help of some traitorous Iranians abroad," the supreme leader said.

The United Nations envoy for Yemen scrambled Monday to revive a six-month truce after a missed deadline raised fears of a return to war and prompted rebel threats against Saudi Arabia and the United Arab Emirates.

Special envoy Hans Grundberg pledged "relentless efforts" to reinvigorate the truce, which lapsed on Sunday after bringing a sharp reduction in clashes since it came into force in April.

Lebanon said Monday it will send remarks to Washington's proposal to resolve a maritime border dispute with Israel, with which it is technically still at war, over gas-rich waters.

A draft agreement floated by US envoy Amos Hochstein aims to settle competing claims over offshore gas fields and was delivered to Lebanese and Israeli officials at the weekend, following years of indirect negotiations.

On Monday, Lebanon's top leaders met to discuss the offer, delivered via Washington's ambassador to Lebanon, Dorothy Shea.

The United Arab Emirates, which already boasts the world's tallest skyscraper and has launched a bold Mars mission, now hopes to become a pioneer in the depths of the metaverse.

In a project launched at Dubai's gleaming Museum of the Future, it announced that the UAE's economy ministry was setting up shop inside the immersive virtual world that is now taking shape.

Palestinians living in the Israeli-blockaded enclave of Gaza have long endured an unstable and costly electricity supply, so Yasser al-Hajj found a different way: solar power.

Looking at the rows of photo-voltaic panels at his beachfront fish farm and seafood restaurant, The Sailor, he said the investment he made six years ago had more than paid off.

"Electricity is the backbone of the project," Hajj said, standing under a blazing Mediterranean sun. "We rely on it to provide oxygen for the fish, as well as to draw and pump water from the sea."

Qatar's World Cup squad trained on home territory for the first time in four months Sunday as they seek to overcome some nervy displays in preparatory matches.

Hundreds of fans, mainly migrant workers, turned out to see the players make their rare appearance in a Doha stadium after being kept under wraps at camps in Spain and Austria.

Qatar, which has spent billions of dollars on new stadiums for the first World Cup in an Arab country, is desperate to see the side get past the first round group against Netherlands, Senegal and Ecuador.

A six-month truce in Yemen's war has expired without being extended, the United Nations' special envoy said on Sunday, urging calm and adding that negotiations are continuing.

Hans Grundberg said efforts to extend and expand the ceasefire for a further six months had not been successful.

"The UN special envoy regrets that an agreement has not been reached today, as an extended and expanded truce would provide additional critical benefits to the population," a statement said.

At a bazaar in north Tehran, merchants are paying a high price since protests erupted across Iran more than two weeks ago over the death in custody of young Kurdish woman Mahsa Amini.

"It was hardly great even before, because of the economic crisis that has hit our country under US sanctions," sighed 53-year-old shopkeeper Mehdi, sitting on a stool at a stall where he sells T-shirts.

"But now with the protests our work has been cut in half," said Mehdi, who like other merchants interviewed cautiously avoided comment on the protest movement itself.

Israel on Sunday praised a US proposal to resolve the country's maritime border dispute with Lebanon, building further momentum towards an agreement between two nations still technically at war.

The draft agreement floated by US envoy Amos Hochstein aims to settle competing claims over offshore gas fields and was delivered to Lebanese and Israeli officials at the weekend.