Tehran is beside the Qatari government and nation, said Rouhani adding: "We believe that if there are disagreements among countries of the region, pressure, intimidation, and sanction are not good ways for settle the disagreements".
Accusing Qatar of supporting terrorism, Saudi Arabia, the United Arab Emirates, Egypt and Bahrain cut ties with Doha on June 5. "A lowering of rhetoric would also help ease the tension".
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".
Saudi Arabia said today a Turkish military base similar to that built in neighbouring Qatar would not be welcome in the kingdom, insisting it is "not needed".
According to Al Mayadeen broadcaster, the Qatari Emir said that Doha "is seeking a complex development of relations and cooperation with Iran in order to solve the problems of the Islamic world, which is now in a hard situation". Turkey shipped suppliers and food via cargo planes to Qatar after its neighbors closed down air, land and sea routes.
Nauert said Washington was "mystified that the Gulf states have not released to the public nor to the Qataris the details about the claims that they are making".
They are also demanding that Qatar hand over all individuals who are wanted by those four countries for terrorism; stop funding any extremist entities that are designated as terrorist groups by the USA; and provide detailed information about opposition figures that Qatar has funded, ostensibly in Saudi Arabia and the other nations.
"He feels very much threatened and reads that the move is actually against him personally", said Abdullah Bozkurt, president of the Stockholm Center for Freedom and author of Turkey Interrupted, Derailing Democracy.
"Just like the presence of other foreign military bases or units in other countries of the region, our military presence in Qatar is principally based on a decision taken by the two countries relying on their sovereign rights", ministry spokesman Huseyin Muftuoglu said.
"At this point we are left with one simple question: Were the actions really about their concerns regarding Qatar's alleged support for terrorism, or were they about the long-simmering grievances between and among the GCC countries?"
The deal lay stagnant in the Turkish parliament but was quickly rushed through for approval after the row erupted this month. "This opens the door to all kinds of clandestine military operations by inserting a vague/undefined term in the agreement".
Doha also said it is reviewing the demands and is preparing an official response after confirming the receipt of the document on Thursday.