Oman's Sultan Haitham bin Tariq al-Said is set to visit Moscow on Monday, days after the start of a round of Muscat-mediated nuclear talks between the U.S. and Iran. The sultan will hold talks with Russian President Vladimir Putin on Tuesday,

The foreign ministry of Oman, which is mediating the nuclear negotiations between the United States and Iran, said the two sides were seeking an agreement that guarantees the Islamic republic does not possess nuclear weapons.

The United States and Iran are due to hold their second round of nuclear talks on Saturday, as what both sides are looking for in a deal begins to take shape.