In their apparent bid to secure United States support and that of Israel, Riyadh, Manama, Cairo and Abu Dhabi suspended all land, air and sea traffic with Qatar, expelled its diplomats and ordered Qatari citizens to leave their countries.
Tillerson said that the "series of requests presented by Bahrain, Egypt, Saudi Arabia and the UAE" at least partly provides "a basis for ongoing dialogue leading to resolution". They accuse Qatar of backing terrorism, the BBC added.
He urged the sides to continue negotiations by saying that it would be a "productive step", adding that the U.S. believes its allies are "stronger when they are working together".
On Sunday, Turkish President Recep Tayyip Erdogan expressed his "unconditional support" for Qatar and denounced the Gulf States' demands as running "contrary to global law".
Washington, Dammam, Khartoum - US Secretary of State Rex Tillerson said on Sunday that Qatar has started to review the list of 13 demands to end its crisis with the Arab states. In addition, the four Arab governments want Qatar to downgrade links with Iran, turn over opposition figures it has been holding and shut a Turkish military base in the emirate. Bahrain, one of the other countries involved in the spat, is host to U.S. Naval Forces Central Command and the U.S. Fifth Fleet. It added that the demands submitted by the four Arab countries were a violation of the worldwide law.
"Re-evaluating the base agreement with Qatar is not on our agenda, " he said. A lowering of rhetoric would also help ease the tension.More news: Confederations Cup Preview: Cameroon vs Germany
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Among other items, the four countries demanded that Qatar shut down the Al-Jazeera television network, long a source of conflict between Qatar and its neighbors.
On June 5, Bahrain, the United Arab Emirates, Saudi Arabia, Egypt, Yemen, Libya's transitional government, the Republic of Maldives and the Republic of Mauritius severed diplomatic ties with Doha in retaliation for what they described as Qatar's support for terrorism and extremism, its hostile policy and intervention in the affairs of Arab states.
As chairman of the Foreign Relations Committee, Corker plays a central role in these sales.
Sudanese President Omar al-Bashir reiterated his support to Kuwait in bridging the gap between Gulf States and Qatar.
The story raised concerns about the closure of Al Jazeera, citizenship rights and extraditions.