Most foreign currency shops and outlets in Tehran’s Grand Bazaar were shuttered today while hundreds of Iranian riot police patrolled in the downtown area a day after protests over the tumbling national currency.

Police units were visible around Ferdowsi and Manouchehri streets, near one of the main areas for currency traders in the capital as well as roads surrounding the Grand Bazaar further south. The minority of exchange houses that did open failed to display prices or carry out transactions.