Months of tension between Qatar and Saudi Arabia over Qatar's continued support for the Muslim Brotherhood came to a head last week. It has been reported that a Saudi official threatened to close Qatar's border with Saudi Arabia if the emirate does not cease supporting the Muslim Brotherhood.
The Kingdom believes that the Emir of Qatar, Sheik Tamim Bin Hamad Al-Thani, has not observed an agreement that he signed in Riyadh vowing to stop using Qatari soil for actions that harm the Kingdom. Saudi Arabia opposes the Muslim Brotherhood, both domestically and in Syria and Egypt. The agreement was signed two months ago, in presence of the Emir of Kuwait. The presence of the Emir as a witness was allegedly because the King does not trust the Emir to abide by the agreement.
Egypt also has warned Qatar over its support of the Muslim Brotherhood. Both Saudi Arabia and Egypt view Qatar as being in breach of the Gulf Cooperation Council's guidelines for policies and positions. The Egyptian Foreign Minister Dr. Nabil Fahmy has been reported as saying "We reject the Qatari stance, in form and content, and there should not be any intervention in internal Egyptian affairs."
Egypt's interim government has declared the Muslim Brotherhood to be a terrorist organization.