The coordinated move dramatically escalates a simmering dispute over Qatars support of the Muslim Brotherhood, the worlds oldest Islamist movement, and adds accusations that Doha even backs the agenda of regional arch-rival Iran.
The three Gulf states announced the closure of transport ties with Qatar and gave Qatari visitors and residents two weeks to leave their countries.
Saudi Arabia accused Qatar of backing militant groups and spreading their violent ideology, in an apparent reference to its influential state-owned satellite channel al Jazeera.
"(Qatar) embraces multiple terrorist and sectarian groups aimed at disturbing stability in the region, including the Muslim Brotherhood, ISIS (Islamic State) and al-Qaeda, and promotes the message and schemes of these groups through their media constantly," state news agency SPA said.
The statement went on to accuse Qatar of supporting what it described as Iranian-backed militants in its restive and largely Shiite Muslim-populated Eastern region of Qatif and in Bahrain.
There was no immediate Qatari reaction to the announcements, but it has denied supporting terrorism or Iran in the past.
On its state news agency, Egypt, the Arab worlds most populous nation, said Qatars policy "threatens Arab national security and sows the seeds of strife and division within Arab societies.(*)
Editor: Heru Purwanto
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