Juan Cole's comment:
The US kidnapped another Iranian from Iraqi Kurdistan, alleging that he is an officer in the Quds Force section of the Iranian Revolutionary Guards and an arms smuggler. The Kurdistan Regional Authority says that he is Aghai Farhadi, a trade representative of Kirmanshah Province in Iran.
Either the US suspicions about Farhadi are baseless, or the Kurds are the major conduit for Iranian arms into Iraq.
Five other Iranians were kidnapped from Irbil by the US military. Farhadi would not be doing what he was doing in Sulaimaniya unless he was the guest of Iraqi President Jalal Talabani. If he was smuggling in arms, he was smuggling them to the Peshmerga, the Kurdish paramilitary, which is allied with the United States. Presumably this means that the Peshmerga is either transfering the weapons to the Badr Corps selling the arms off on the Iraqi black market.
If this scenario is correct, then it is pure propaganda for the USG to complain so loudly and bitterly about Iranian meddling in Iraq, when it is being facilitated by some Kurds, who are in turn putative US allies.