Qatar hosts the largest U.S. airbase in the region, which is crucial to operations against Islamic State group jihadists.
"The era of cutting diplomatic ties and closing borders.is not a way to resolve crisis".
Jane Kinninmont, a senior research fellow at London's Chatham House, said the renewed tensions were not clearly linked to "something new that Qatar has done".
Its pitch as one of the most stable countries in the region is shaky now as neighbours accuse it of funding terrorist groups "that aim to destabilise the region".
Riyadh also accused Doha of supporting Iran-backed "terrorist activities" in Saudi Arabia's Shi'ite-dominated area of Qatif, as well as in Bahrain, both of which have seen Shi'ite unrest over the past six years.
"What is happening is the preliminary result of the sword dance", Aboutalebi said, in a reference to US President Donald Trump's recent visit to Saudi Arabia.
Riyadh ordered its nationals to leave Qatar-host of the 2022 football World Cup-within 14 days and barred Qataris from the kingdom.
Qatar is the world's biggest supplier of liquefied natural gas (LNG) and a major supplier of condensate.
Egyptian Civil Aviation Ministry decided Monday to suspend flights to and from Qatar as of Tuesday amid a growing diplomatic crisis between Cairo and Doha.
Meanwhile, the crisis has claimed its first sporting victim.
Qatar had assigned warplanes to the coalition conducting air strikes against Yemen's Huthi rebels.
"We are getting a lot of calls regarding this".
US Secretary of State Rex Tillerson urged the Gulf Cooperation Council nations to sort out their differences.
Doha denied all the comments and said it had been the victim of a "shameful cybercrime".
Al-Jazeera reported Qatar's foreign ministry said it regretted the measures by the Arab nations, calling the decisions "unjustified".
DUBAI, June 5 (Reuters) - Qatar's stock market plunged on Monday after four Middle Eastern states severed ties with Doha, while Saudi Arabian shares rose on hopes that index compiler MSCI will move towards upgrading it to emerging market status.
The spark for this flare-up was a report by the state-run Qatar News Agency that carried comments by Qatar ruler Sheikh Tamim bin Hamad Al Thani criticizing mounting anti-Iran sentiment.
Qatari officials did not immediately respond to a request for comment.
A source familiar with the matter said QNB's business in Saudi Arabia and Egypt was unaffected. In a letter addressed to Prime Minister Narendra Modi and Union Foreign Minister Sushma Swaraj over the current "geo-political situation" brewing in the Middle East, Kerala Chief Minister Pinarayi Vijayan has stated that he extends his full support to the Centre on the steps they take in the matter.