CAIRO, Sept 1 (Reuters) - Chinese President Xi Jinping arrived in Egypt on Tuesday, his first visit to the Arab world's most populous nation in a decade, as countries across the Middle East reassess security and economic ties amid the fallout of the Iran war.

The conflict has disrupted global energy markets and raised questions about whether regional countries can count on the United States as a long-term security partner.

BRUSSELS, Sept 1 (Reuters) - More than 10 European Union members are willing to contribute resources and people to a planned ​mission to advise and train Lebanon's armed forces, EU foreign policy chief Kaja Kallas said on Tuesday.

The proposed mission stems from the EU studying ways to strengthen Lebanese forces to help free up the Lebanese ​army to focus on disarming the armed group Hezbollah.

By Rick Noack

ISLAMABAD, Sept 1 (Reuters) - The Himalayan region faces severe risks from future glacial floods, a senior U.N. official has warned, as the death toll from last week's flood in Nepal, triggered by a glacier's collapse, surpassed 1,000.

Not only is the hydroelectric power that many depend on threatened, but entire riverbanks where millions live might become effectively uninhabitable.

By Ahmad Ghaddar, Enes Tunagur and Robert Harvey

LONDON, Sept 1 (Reuters) - For the first time on record, Iran has gone about seven weeks without shipping meaningful crude exports through the Strait of Hormuz, as a U.S. naval blockade succeeds where years of sanctions failed by cutting off one of Tehran's main sources of foreign-currency earnings.

Chinese President Xi Jinping arrived in Egypt on Tuesday on a rare trip to the Middle East as both countries face the threat of US sanctions over financial links to Iran.

Xi and his wife were greeted on the tarmac by Egyptian President Abdel Fattah al-Sisi and the first lady, as well as a performance by an Egyptian folk dance troupe.

Prime Minister Benjamin Netanyahu said Israeli forces captured a senior Hamas figure on Tuesday during a ground operation in Gaza that Palestinian health officials said killed four people.

The premier said in a statement that the target was the head of Hamas's internal security apparatus in Gaza, and that he had been involved with Israeli hostages previously held there, without giving more details. 

Hamas's Interior Ministry in Gaza and Israeli media identified the man as Muein al-Arabid. 

NICOSIA, Sept 1 (Reuters) - A specialist team from Turkey equipped to search deep waters started work on Tuesday to pinpoint the wreckage of a ferry that capsized off northern Cyprus on Sunday, with 20 people still missing.

At least eight people died when the twin-hulled vessel started taking in water and overturned shortly after leaving the port of Kyrenia with 267 passengers and crew on board.

By Florence Tan

SINGAPORE, Sept 1 (Reuters) - Two supertankers carrying Saudi oil were struck by unknown projectiles within minutes of each other while transiting outbound through the Strait of Hormuz late on Monday, according to shipping intelligence and tracking firms Marisks and Kpler.

"The near-simultaneous incidents represent a further escalation in the threat environment within the Omani corridor," Marisks said.

DUBAI, Sept 1 (Reuters) - Iran will immediately reciprocate if the United States returns to its commitments under an interim deal signed in June, President Masoud Pezeshkian said on Tuesday.

He made his comments at the Shanghai Cooperation Organisation Summit in Bishkek after the first exchange of direct attacks in the U.S.-Iran conflict since late July, with the U.S. striking Larak Island and Iran then launching attacks on two U.S. air bases in Jordan.

Iran's President Masoud Pezeshkian on Tuesday vowed to match any US move to return to a June deal aimed at ending their war, warning that diplomatic efforts could be e