Qatari foreign minister Sheikh Mohammed bin Abdulrahman Al Thani questioned the timing of a leak of secret documents as US Secretary of State Rex Tillerson arrived in the region for shuttle diplomacy between Jeddah, Doha and Kuwait City, Al Jazeera reported on Wednesday.

Qatari Foreign Minister Sheikh Mohammed bin Abdulrahman Al-Thani. /VCG Photo

"These are clear efforts to diminish the mediation by Kuwait, and the efforts of the United States to mediate this crisis," the Qatari Foreign Minister said in a joint press conference with Tillerson in Doha. 

Saudi Arabian media published two secret documents known as the Riyadh Agreements, which were signed separately in 2013 and 2014 by Gulf nations with Qatar.  

They concern commitments to avoid any interference in the internal affairs of other Gulf nations, including barring financial or political support to terrorist groups.