Tehraninfo-icon:- A senior Iranian official has conveyed a message from Supreme Leader Ayatollah Seyyed Ali Khamenei to Russian President Vladimir Putin during a meeting in Moscowinfo-icon.

Ali Akbar Velayati, a senior aide to Ayatollah Khameneiinfo-icon, carried the special message for the Russian head of state on Thursday.

The meeting was also attended by Ali Asghar Fathi, the Leader's special advisor on international affairs, Iranian Ambassador to Russiainfo-icon Mehdi Sanaei, Russian Foreign Minister Sergei Lavrov and the Kremlin's top foreign policyinfo-icon aide Yury Ushakov, Press TVinfo-icon repotted.

Velayati's visit comes as Iran braces for renewed U.S. economic sanctions.

Following the meeting, Dr Velayati, who served as Iran's foreign minister during eight year long Iran-Iraqinfo-icon warinfo-icon, said his discussions with the Russian president were "highly constructive, transparent and friendly."

Iran's Leadership has long viewed relations with Moscow as "strategic," said Velayati, adding that the Islamic Republic "pursues this policy with the Leader's guidelines."

He added that the Iranian and Russian nations share many commonalities and that ties between the two sides are today much stronger than before.

The Kremlin also said in a statement that Putin and Velayati exchanged views on bilateral Tehran-Moscow relations and the developments in the Middle Eastinfo-icon, including the Syriainfo-icon crisis.

Speaking to reporters upon arrival in Moscow on Wednesday, Velayati lauded the "strategic" relations between Tehran and Moscow, expressing hope that his visit would be a turning point in bilateral ties.

"Putin reiterated that Russia rejects Americainfo-icon's decision to impose sanctions on Iran ... He said Russia will stand by Iran and will defend Tehran's rights," Velayati said.

He added that the cooperation in the region between the resistance front led by Iran and Russia against terrorism and its supporters in Syria and other regional countries was indicative of an exemplary, strategic and long-term partnership between the two countries.

Tehran has been pushing hard to hold oilinfo-icon output steady amid U.S. sanctions that are expected to hit its exports.

"Putin said that Russia is prepared to continue its oil investment in Iran at the level of $50 billion. It means Russia is ready to invest this amount in Iran's oil sector," Velayati said.

"This is an important amount that can compensate for those companies that have left Iran (amid U.S. sanctions fear)," Velayati said, in a reference to a number of firms, wary of U.S. sanctions, that have already said they plan to pull out of Iran's marketinfo-icon.

In a meeting in Tehran with Putin last November, Ayatollah Khamenei praised Iran-Russia cooperation in the fight against terrorism in Syria, stressing that the solution of the Syria crisis requires continued cooperation between the two countries.

During those talks, Putin told Ayatollah Khamenei that Iran was "a strategic partner" and a "great neighbor," stressing that he would welcome any potential to fully bolster and expand bilateral relations.

The Russian head of state also hailed the achievements of the Iran-Russia cooperation in the war against terrorism.

Iranian Foreign Ministry Spokesman Bahram Qassemi said on Tuesday that Velayati's visit was part of efforts to make Iran's stance clear after the USinfo-icon's pullout from the JCPOA signed between Tehran and the P5+1 group of countries in 2015.

US President Donald Trumpinfo-icon announced on May 8 that Washington was walking away from the nuclear agreement, signed between Iran and the five permanent members of the United Nationsinfo-icon Security Council -- the United Statesinfo-icon, Britaininfo-iconFranceinfo-iconChinainfo-icon and Russia -- plus Germanyinfo-icon.

Trump also said he planned to reinstate US nuclear sanctions on Iran and impose "the highest level" of economic bans on the Islamic Republic.

Apart from the United States, the other signatories to the 2015 Iran nuclear accord - Russia, China, Germany, France and Britain - have said they still support the deal.

Tehran has conditioned its stay in the deal to practical European strides to make sure Iran's dividends from the deal would not be affected when US sanctions "snap back" in August.