Ali Akbar Velayati, Iran's Supreme Leader Ayatollah Ali Khamenei's top adviser on global affairs, smiles as he listens to questions from the media during a news conference after meeting with Lebanon's Prime Minister Tammam Salam at the government palace in Beirut May 18, 2015. The United States pulled out of a multinational deal in May to lift sanctions against Iran in return for curbs to its nuclear programme.
Putin's spokesman, Dmitry Peskov, said that Velayati handed Putin letters from Khamenei and Iranian President Hassan Rohani, but refused to elaborate.
"Qassemi said after Trump's "strategic mistake" to exit the multilateral and worldwide accord, Iran chose to dispatch a number of its special representatives" to other countries to "carry messages of high-ranking" Iranian officials about the country's viewpoints and stance on the "selfish" USA behavior which runs counter to worldwide regulations.
"In these messages, our country's views and stances regarding the US' selfish and illegal behavior are explained to other countries", he said.
Tehran and Moscow already cooperate militarily in Syria, and have been instrumental in sustaining President Bashar al-Assad during the country's brutal seven-year civil war.
"He makes baseless and illogical remarks and nobody cares about his words", the Iranian official said.
Qassemi told the IRIB that Velayati will also pay a visit to China to convey messages from Ayatollah Khamenei and Rouhani to Chinese leaders. "Therefore, it is necessary that the cooperation [between Iran and Russia] be increased", Velayati said.
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Stoltenberg said he had called the extra session because the allies felt the issue of burden sharing needed more discussion. Trump said he did not think Russian Federation would have invaded Crimea if he had been in the White House at the time .
But European firms are reluctant to risk far-reaching USA financial penalties they would face for doing business in Iran.
This comes just one day after Israeli Prime Minister Benjamin Netanyahu called for Iran to withdraw its troops from Syria.
"Therefore, his presence or absence in Russian Federation has no effect on our strategic mission", he added.
Amir-Abollahian said Netanyahu was likely to ask for Putin's help to push Iran's military advisers out of Syria but added that this was an issue that could only be decided between Tehran and Damascus.
A senior advisor to Iran's Leader says the country's military presence in Syria does not hinge on what Israel wants.
Trump and Putin are expected to discuss Iran's regional role and the Syrian conflict at a summit in Helsinki next Monday.