The Iranian "Threat" to Putin

Over the weekend a Russian news service reported that Russian officials were aware of a specific assassination threat against Vladamir Putin during his upcoming visit to Iran. It is entirely possible that there is a threat to Putin's safety in Iran, but something struck me as unusual about this story, and I just can't quite put my finger on it. I then began to wonder if Putin wasn't doing a little PR to continue to bolster his brave, manly image in Russia as he refused to cancel his trip, which then got me wondering if the "threat" was completely made up by the Russian government to begin with. It's thin, I know, but not something I'd put past this current rendition of the Russian government.