Turkish President Recep Tayyip Erdogan said Thursday that any possibility of a direct confrontation between Russia and NATO was "worrying," the official Anadolu news agency reported.

Erdogan's comments came as NATO leaders huddled in Washington and Kremlin spokesman Dmitry Peskov said that Russia was planning "response measures" to contain the "very serious threat" from the alliance.

Rescue efforts were underway Wednesday for more than 130 people including some tourists who were trapped in a mountainous town in China's Tibet region after heavy rains and flooding washed away sections of a provincial highway, China's state media said.

Those trapped also included migrant workers and business people, according to state broadcaster CCTV. Another 342 stranded people had been relocated earlier to nearby towns.

Seven-time champion Novak Djokovic reached the Wimbledon semi-finals on Wednesday when "devastated" Alex de Minaur withdrew from their last-eight clash with a hip injury.

Australian ninth seed De Minaur suffered the injury in his fourth-round win over Arthur Fils and admitted Wednesday: "I am devastated to pull out due to a hip injury".

France on Wednesday condemned Israel's recent deadly air strikes on schools sheltering displaced Palestinians in Gaza, declaring such tactics "unacceptable".

"We call for these strikes to be fully investigated," the foreign ministry said, highlighting a strike on Tuesday on a school near the southern city of Khan Yunis.

Syria's national airline resumed regular services to Saudi Arabia after a 12-year suspension on Wednesday as the first flight arrived in Riyadh.

The Israeli army on Wednesday dropped leaflets on Gaza City urging all residents to leave for safe zones amid an intensified military offensive on the Palestinian territory's main city.

The thousands of leaflets, addressed to "everyone in Gaza City", set out routes out of the city to the south and warned it would "remain a dangerous combat zone", an AFP journalist said.

Israeli police said two people were killed by rocket fire in the annexed Golan Heights, the latest victims of months of cross-border clashes between Lebanon's Hezbollah and Israeli forces.

The deaths came after a Syria war monitor said an Israeli strike in the country killed two people, with a source close to Iran-backed Hezbollah saying a former bodyguard to the group's leader died in the raid, and the militant group announcing retaliatory fire.

A war monitor said two people were killed Tuesday in an Israeli strike on a vehicle belonging to Lebanon's Hezbollah group in the Damascus countryside near the Lebanese border.

Hezbollah has traded almost daily cross-border fire from Lebanon with the Israeli army since October in support of Palestinian ally Hamas, with Israel targeting operatives from the group in both Lebanon and neighboring Syria.

Qatari and Egyptian mediators are cajoling Israel and Hamas towards negotiations on a plan to end their war, which has left tens of thousands dead.

U.S. President Joe Biden first outlined in late May what he called an Israeli initiative for a truce and hostage release deal. Mediators are now embroiled in secret contacts with both sides, who have launched diplomatic barbs ahead of this week's talks.

Egyptian President Abdel Fattah al-Sisi met CIA director William Burns Tuesday in Cairo, where US and Israeli delegations discussed efforts for a Gaza truce.