Zarif tweeted on Sunday, a day after relative moderate President Hassan Rouhani won re-election in Iran.
Melania Trump greeting women at a Women's Service Centre in Saudi Arabia.
Keane described Trump's first stop in Saudi Arabia as "quite a seminal event that's taking place here".
The tour will include Saudi Arabia, Israel, Italy and Belgium and President Trump will be attending both the North Atlantic Treaty Organisation and G7 summits.
"In every country, including the United States, women and girls face challenges", Ivanka Trump told a small group of accomplished Saudi women gathered for a dialogue with her about how to build on their successes.
However, Melania and Ivanka are not the only women, who did not cover their hair upon arrival in the conservative Islamic kingdom, as former US state secretary Hillary Clinton, former first lady Laura Bush, British Prime Minister Theresa May and German Chancellor Angela Merkel had also not covered their hair in Saudi Arabia. Officials spent the days before Trump's departure dealing with a steady stream of revelations about the federal investigation into his campaign's possible ties to Russian Federation and the fallout from his firing of FBI Director James Comey.
President Donald Trump, center left, walks with Saudi King Salman, center right, during a welcome ceremony at the Royal Terminal of King Khalid International Airport on Saturday in Riyadh. They needed to hear Trump say that, too.
White House aides had hoped Trump's ambitious foreign swing would provide relief from a barrage of bad headlines. He said he had not "information or knowledge" on the matter.
Makarova stuns top seed Kerber in French Open 1st round
Schiavone , the 2010 champion, showed her usual fighting spirit and saved three match points before going down when she sent a forehand volley wide.
It was not clear if the $110 billion defense deal was included in that sum, or is separate, as Zarif's calculation suggests.
The visit raised questions about whether the USA would indicate the site is Israeli territory. While Trump campaigned as a strident opponent of the nuclear deal, his administration is still reviewing whether to scrap the accord.
Trump also devoted much of his speech to railing against Iran, accusing it of trying to destabilize the region.
During meetings this weekend, Trump will work to develop relationships with the leaders, with whom the United States hopes to partner to fight extremism.
US President Donald Trump on Sunday urged Muslim countries to deny sanctuary to extremists and called for the worldwide isolation of Iran, which he accused of fuelling "sectarian conflict and terror".
It was especially sensitive given tensions sparked by the Trump administration s attempted travel ban targeting several Muslim-majority nations and his previous remarks, including a 2015 statement that "Islam hates us".
Advance excerpts of the speech had Trump using the term "Islamist terrorism" - an apparent softening in tone - but the president veered off-script in his delivery.
This story was first published on CNN.com, "Trump lands in Saudi Arabia as controversies swirl at home".