Foreign ministers meet in Kuwait City in one of the highest official encounters since the row over Qatar began in June.
Monday's gathering came a day before a key summit of the Gulf Cooperation Council (GCC), a regional Arab alliance now facing its worst diplomatic crisis because of the row over Qatar.
However, according to an Al Arabiya Channel correspondant on Monday, the Saudi Minister of Foreign Affairs Adel al-Jubeir arrived in Kuwait in the afternoon.
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It was not immediately known if the foreign ministers and the leaders at the summit will discuss the worst political dispute in the GCC's 36-year history.
The Kuwaiti Emir Sheikh Sabah al-Ahmad al-Sabah also held a meeting with the Secretary General of the Gulf Cooperation Council Abdullatif al-Zayani.
Sheikh Mohammed sat around a large wooden table in Bayan Palace with representatives from Saudi Arabia, the UAE, Kuwait, Oman and Bahrain to make preparations for the top-level summit.
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He stressed the importance of GCC meetings in continuing cooperation between the member states for the interest of the people and to confront the dangers threatening the security and stability of the region. Doha denies the allegations. However, it is not clear if all heads of state will attend the two-day summit.
The last GCC summit was held in Bahrain in 2016.
The GCC council is a political and economic alliance of countries in the Arabian Peninsula.
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