President Hassan Rouhani has warned of the consequences of the presence of unwanted foreign forces in Syria, insisting on Iran’s long-held policy that the Syrian crisis cannot be resolved militarily.

Russian companies are expected to invest over $50 billion in development of oil and gas fields in Iran, Tass reported quoting Russian presidential aide Yuri Ushakov as saying on Monday.

His Majesty King Abdullah II, on Tuesday received an invitation from the Saudi King Salman Bin Abdul Azizi Al Saud to participate in the Arab Summit scheduled to be held in Dhahran city on April 15.