While there was little additional information on the Ultimatum and more importantly what happens should Qatar not comply, Al Jazeera reported that Kuwait's emir, Sheikh Sabah Al Ahmad Al Jaber Al Sabah, left Saudi Arabia on Tuesday after holding mediation talks with the Saudi King Salman bin Abdul Aziz to try to defuse an escalating crisis between Arab countries and Qatar. No details were given on the talks.
In addition to Saudi Arabia's aggressive approach, Egypt's Foreign Ministry accused Qatar of taking an "antagonist approach" towards Cairo and said "all attempts to stop it from supporting terrorist groups failed". Qatar denied the allegations, with a Foreign Ministry statement describing them as "baseless" on Monday.
Speaking to Al Jazeera, analyst Giorgio Cafiero of Gulf State Analytics, a geopolitical risk consultancy based in Washington, DC, said: "I think the Kuwaitis as well as Omanis ... fear the prospects of these tensions escalating in ways which could undermine the interest of all six members of the GCC.
"There are many analysts who believe that a potential break-up of the GCC has to be considered right now."
"If these countries fail to resolve their issues and such tensions reaches new heights, we have to be very open to the possibility of these six Arab countries no longer being able to unite under the banner of one council," said Cafiero.
He added that if tension escalates, some have warned of a "military confrontation".