ANKARA, June 21 (Reuters) - Turkish President Tayyip Erdogan ordered officials on Sunday to resume talks on reopening an Orthodox Christian seminary near Istanbul, an issue raised by U.S. President Donald Trump, who is expected to visit Ankara next month for a NATO summit.

The Halki seminary, founded in 1844 and shut by the Turkish state in 1971, played a central role in the Eastern Orthodox Church as the Ecumenical Patriarchate's main theological school. It trained generations of Orthodox clergy, including the current patriarch Bartholomew, who is based in Istanbul.

VIENNA, June 21 (Reuters) - A technical fault in air traffic control, triggered by security measures for peace talks between the U.S. and Iran in Switzerland, caused disruptions at Zurich airport on Sunday, aviation authorities said, adding the problem had been resolved.

The glitch occurred following the integration of a restricted zone over Buergenstock, the Swiss mountain resort where negotiations are taking place, into radar display systems, Swiss air traffic control authority Skyguide said.

JERUSALEM, June 21 (Reuters) - Israeli soldiers are free to act without restriction to eliminate threats in Lebanon, Israeli Defence Minister Israel Katz said on Sunday, adding troops remained in position in what Israel refers to as a security zone.

A ceasefire with Iran-backed Hezbollah took effect on Friday after months of escalating violence, but on Saturday Israeli strikes killed at least 20 people in Lebanon, Lebanon's state news agency NNA reported.

June 21 (Reuters) - Iran's Tasnim news agency, citing a source close to the negotiating team, reported on Sunday that the Strait of Hormuz would not be reopened as long as a ceasefire in Lebanon was not respected.

The source said the waterway would also remain closed until waivers allowing the sale of Iranian oil were issued.

(Reporting by Eman Abouhassira, Editing by Louise Heavens)

A wounded Spain will aim to get their World Cup challenge firmly back on track when they face Saudi Arabia in Atlanta on Sunday.

Spain coach Luis de la Fuente said his players had been stung by the criticism after they were held to a goalless draw in their opening match by Cape Verde, the African archipelago of just over half a million people who are making their World Cup debut.

Beneath the scorching sun in Pakistan's southern mango belt, labourers balance on tree branches, working at a swift pace to throw the freshly picked fruit into sacks held ready by farmhands waiting below.

Though mango season is well underway, far less of the fruit will be bound for the lucrative export market than usual, with Pakistan's agriculturally dependent economy caught in the crosshairs of the Middle East crisis that its government has helped mediate.

ZURICH, June 21 (Reuters) - U.S. Vice President JD Vance arrived in Switzerland on Sunday for what he has said would likely be a couple of days of peace talks with Iranian officials.

Vance and his wife arrived at Emmen Air Base in Switzerland at 5:59 a.m. (0359 GMT), a vice presidential spokesperson said.

(Reporting by Humeyra Pamuk in Zurich; Editing by William Mallard)

Saudi Arabia coach Georgios Donis said his side cannot show Spain too much respect as they aim to repeat a shock victory over eventual winners Argentina at the 2022 World Cup.

Spain are under pressure to bounce back from a 0-0 draw against World Cup debutants Cape Verde, but face a Saudi side that themselves held Uruguay to a 1-1 draw in their opening game.

Donis only took charge of the 2034 World Cup hosts in April after short-lived reigns for Roberto Mancini and Herve Renard.

By Humeyra Pamuk, Jana Choukeir, Ahmed Tolba and Steve Holland

ZURICH/DUBAI/WASHINGTON, June 21 (Reuters) - Negotiators from the United States and Iran were set to start peace talks in Switzerland on Sunday, even as U.S. officials disputed Iranian claims about closing the key Strait of Hormuz.

A high-level Iranian team arrived in Switzerland for peace talks with the U.S., Iranian state media reported, as U.S. Vice President JD Vance departed Washington for meetings that Pakistan said will begin on Sunday.

Omar Marmoush once rejected the chance to play for Canada, but in Vancouver on Sunday will aim to become a national hero back home in Egypt by making World Cup history.

The Pharaohs are powerhouses of African football with a record seven continental titles but are yet to win a match in eight games at the World Cup.

A meeting with New Zealand, ranked 56 places below Egypt in the FIFA rankings, offers a golden chance for an elusive World Cup victory and with it progress beyond the group stages for the first time.