On June 5, 2017, an alliance of Saudi Arabia, UAE, Bahrain and Egypt abruptly severed ties with Doha, accusing it of supporting terrorism and Iran.

"(There's) a lot of talk about imaginary victories and isolating Qatar, but after one year, the reality proved the opposite as Qatar emerged as an international partner that can be trusted."

"One year on and Qatar and its people are stronger," Al-Thani, one of the most prominent voices in the region's worst diplomatic crisis for years, wrote on Twitter.

Mohammed bin Abdulrahman Al-Thani also rebuked Qatar's foes for "imaginary victories" against the small Gulf state, the target of a Saudi-led boycott.

On the first anniversary of a bitter Gulf diplomatic rift, Qatar's foreign minister on Tuesday declared his country stronger than ever and said it was open to dialogue with its regional rivals.

Qatar soon found its only land border closed by Saudi Arabia, its state-owned airline barred from using neighbours' airspace, and residents expelled from the qua

rtet's countries.

Despite hopes that the rancorous rift between the former allies -- which include some of the richest countries on earth -- would be resolved quickly, the crisis has endured.

Qatar claims the dispute is an attack on its sovereignty and punishment for pursuing an independent foreign policy.

Diplomatic efforts led by Kuwait and the United States have so far stalled.

Al-Thani said the "door is still open for dialogue" between the Gulf rivals.

However, he also told Qatar state-funded broadcaster Al Jazeera on Tuesday that Doha would continue with its purchase of the Russian S-400 air defence missile system.

Saudi leaders have asked French President Emmanuel Macron intervene to prevent the deal going ahead, raising fears of military action in the dispute.

'Smear campaign'

Despite the impact of the crisis, many in Qatar view the past year's events as a victory for Doha.

Qatari papers were jubilant on Tuesday, with headlines such as "Triumphant Qatar stays United" and "Qatar shines as smear campaign against it fails".

Taxi companies offered free rides to customers to mark the anniversary and some in Qatar have even called for June 5 to be made a national holiday.

Qatar's National Human Rights Committee (NHRC) released a report on the eve of the anniversary claiming more than 4,000 human rights abuses had been committed against Qataris by the Saudi-led alliance over the past year.

Qataris have been exposed to arbitrary arrest and routinely denied freedom of movement, according to the report by the government-appointed body detailing alleged abuses including one case of forced disappearance.

"From the beginning, all the blockading countries have tried to use the people to achieve their political goals," NHRC chairman Ali bin Smaikh Al-Marri said.

There was no immediate reaction from the Saudi-led bloc.

In August, Saudi Arabia will welcome millions of Muslim faithful for the hajj pilgrimage to Mecca, the holiest

city in Islam.

The Saudi government on Tuesday confirmed Qataris wishing to undertake the umrah pilgrimage to Mecca were welcome, but accused the Qatari authorities of a "negative attitude".

The umrah is a lesser pilgrimage that takes place outside of hajj.

Since the start of the crisis, Qatar has accused Saudi Arabia of politicising religious pilgrimages to Mecca, including the annual hajj, one of Islam's five pillars, which every able-bodied Muslim who can afford the journey is obliged to undertake at least once.