Al-Arabiya TV channel early on July 3 said the agreement to extend the deadline came in response to a request by the Kuwaiti emir, who is acting as a mediator in a dispute between Qatar and Saudi Arabia, Egypt, Bahrain, the United Arab Emirates, and others.
The energy-rich Gulf state was given an extra 48 hours to respond to a list of 13 demands such as closing down state-owned al Jazeera and cutting off alleged links to Isis, Iran and the Muslim Brotherhood which the Doha government had previously described as so far-reaching they appear meant to be rejected.
Gabriel was speaking Monday to reporters in the Saudi capital, Riyadh, alongside Saudi Foreign Minister Adel al-Jubeir. The nations have accused Qatar of supporting terrorism, an allegation Qatar denies.
Qatar shares its only land border with Saudi Arabia, it rejects the accusations, calling them "unjustified" and "baseless". Al Thani has said the demands by the Saudis and their partners - including the withdrawal of Turkish troops in Qatar, closure of the Qatari-state-owned Al Jazeera news group, and a downgrading of Qatar's relations with Iran - are impossible to meet without sacrificing Qatar's sovereignty.More news: Wildfires spread throughout 5 states forces evacuation of thousands
"There is no fear".
The White House said in a statement Sunday that Trump spoke separately on calls with Saudi King Salman, Crown Prince Mohamed bin Zayed Al Nahyan of Abu Dhabi and Emir Tamin bin Hamad Al Thani of Qatar.
The summit brings together leaders including President Recep Tayyip Erdogan, U.S. President Donald Trump, and Russian President Vladimir Putin.
The foreign ministers of Egypt, the UAE, Bahrain and Saudi Arabia are also set to meet in Cairo on Wednesday to discuss the Qatar crisis.More news: Led coalition says hit Islamic State targets in Syrian town
Qatar's Gulf critics accuse Al Jazeera of being a platform for extremists and an agent of interference in their affairs.
"We presented our list of demands to Qatar and clarified our position and took our decision, and the list of demands is non-negotiable and must be fully enforced", he added.More news: RB Leipzig demand £70m for Liverpool target Naby Keita?