This is how Russia violated the arms embargo imposed on Iran

Al Arabiya, 16 August 2017 - The German newspaper Die Velt revealed, quoting Western security sources, that Russia is violating the arms embargo and sanctions imposed on Iran by repairing some of Iran’s equipment, defense systems, heavy weapons by airlifting it into Syrian territory, and then to 

https://www.mojahedin.org/newsen/57535/This-is-how-Russia-violated-the-arms-embargo-imposed-on-Iran