Oman's Sultan, Haitham bin Tariq, arrives at Moscow's Vnukovo Airport to a ceremonial welcome on Monday, April 21.
Russian President Vladimir Putin is set to meet bin Tariq on Tuesday, just days after the conclusion of the second round of Oman-mediated nuclear negotiations between Iran and the United States in Rome, Italy.
The initial round of discussions was held earlier this month in Muscat, Oman, where both parties described the talks as 'positive.'