Saudi Arabia will reopen all borders - including airspace, land and sea - to Qatar in a major breakthrough which is being heralded as a move which could potentially end the Gulf crisis.

Borders will be opened from Monday next week in a move which will greatly ease tensions in the three-year-old dispute which involves Qatar, Saudi Arabia and three additional Arab countries.

The latest development will be welcomed by United States diplomats who have sought to build up a united front of Arab nations against Iran.

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