Yes reports from nutty media. None of these reports were backed up by statements from Russia on their sale. The US has always put pressure on Russia in the past ten years to prevent their sale.
If the Russians had supplied S-300 systems to Iran and they deployed them then the US would be vocal in its denoucing of the sale. In reality the Iranians do not operate any S-300 systems or associated radar systems. That is the reason why they don't appear on any threat list for the region.