TEHRAN — Clashes and at least one spontaneous protest erupted in Tehran on Wednesday over the plunging value of Iran’s currency, as black-market money-changers fought with riot police who were dispatched to shut them down, and hundreds of angry citizens demonstrated near the capital’s sprawling merchant bazaar, where many shops had closed for the day. The official media reported an unspecified number of arrests including two Europeans.
http://www.reuters.com/article/2012/09/28/us-cftc-positionlimits-idUSBRE88R1C120120928