Russia and Iran are preparing to sign a treaty to further develop military-technological cooperation, the U.S.-based think tank Institute for the Study of War (ISW) assessed in its latest report on Jan. 15.
Maybe that. In exchange for advancing drones for example. It's just the only country Russia ever shared them to is Belarus, the country they imported police forces in the wake of riots. It's that close relationship. I don't know if Iran has that privilege or Russia feels so desperate to share nukes and nuke accesories to a country it doesn't control like that. Either way, Iran getting nukes is as bad as it can be.