This happened a few minutes ago and is complete news to me. We just had 45's 'very successful' trip to the region and the Gulf Cooperation Council is key to the US and European efforts to maintain some sort of reins on Shia Iran. The GCC countries are overwhelmingly Sunni.
http://www.bbc.com/news/world-middle-east-40155829Saudi Arabia, Egypt, Bahrain and the United Arab Emirates have cut diplomatic ties with Qatar, accusing it of destabilising the region.
The countries say Qatar is supporting terrorist groups including the Muslim Brotherhood.
The Saudi state news agency SPA said Riyadh had closed its borders, severing land, sea and air contact.
It cited officials as saying it was to "protect its national security from the dangers of terrorism and extremism".



