Saudi Arabia's state-run news agency carried an official statement welcoming Trump's remarks, adding that cutting off terrorism funding "required decisive and swift action. regardless of its financier". His wife is a UAE national and is forbidden from travelling to Qatar, while his children are Qatari nationals and so are required to leave UAE.
In a preliminary report published late on Wednesday, the investigators did not say whom they held responsible for the hack. "Leaders pointed to Qatar - look!", he said. Qatar also says that the Federal Bureau of Investigation is in Doha to help track down the source of these hacks.
Qatar Foreign Minister Sheikh Mohammed bin Abdulrahman al-Thani said the country has not been presented with a list of demands by the nations that cut diplomatic and transport ties, but said the dispute must be solved peacefully. Qatar acknowledges its links to these groups, but denies that it supports terrorism.
The US stance on Qatar has been roiled has by the mixed messages from the start.
"What's happening in Qatar at the moment will cause irreparable reputational damage for the Gulf States but also the broader region", Dr Davidson told Times Higher Education.
"The Emir of Qatar has made progress in halting" support for and financing of terrorist groups, Tillerson said, "but he must do more and do it quickly".
Qatar's foreign minister rejected attempts to interfere in the country's foreign policy on Thursday, defying calls from the emirate's Gulf neighbours despite an escalating crisis.
Kuwait - which unlike most of its fellow Gulf Cooperation Council members has not cut off ties with Qatar - has been leading efforts to mediate.More news: Trump says Comey not telling truth, willing to respond under oath
- Abu Dhabi port eases restrictions on oil tankers going to and from Qatar. U.N. Secretary-General Antonio Guterres was also ready to support diplomatic efforts "if desired by all parties", his spokesman said. "I am calling you: There won't be any winners in the brother's fight".
Its foreign minister has struck a defiant tone in interviews, even after anxious residents emptied grocery stores in its capital of Doha as Saudi Arabia has blocked trucks carrying food from entering the country.
Qatar is a peninsula that shares its only land border with Saudi Arabia, and relies heavily on its regional neighbors for imported food and supplies.
"No more funding", Trump said. "A political, economic and social aggression", a Qatari diplomat said.
- Qatari nationals will not be allowed to board flights of Australia's national carrier Qantas to Dubai because the UAE has banned them from passing through its airports, an executive at the airline said.
Turkey, which ratified an agreement to send troops to Qatar on Tuesday, has also called for a peaceful solution to the crisis in diplomatic overtures led by President Recep Tayyip Erdogan.
Kuwait's Sheikh Sabah Al Ahmad Al Sabah was met planeside by Qatar's emir, Sheikh Tamim bin Hamad Al Thani, when he arrived on Wednesday night. The Saudi state news agency had earlier reported that King Salman and Sheikh Sabah had discussed the "development of events in the region", but gave no details.
Amnesty also pointed out that Bahrain, Saudi Arabia and the UAE had warned of harsh punishments, including up to 15 years in jail, "if they dare to criticize these measures" against Qatar. "No one should be punished for peacefully expressing their views or criticizing a government decision", said Lynch.
Analysts say the crisis is in part an extension of a 2014 dispute, when Saudi Arabia, the UAE and Bahrain temporarily recalled their ambassadors from Doha over Qatari support for Egypt's Muslim Brotherhood.