Iranian riot police clashed with demonstrators and foreign exchange dealers in the capital Tehran over the collapse of the country's currency.
Iran's currency, the Iranian rial, has lost a third of its value against the dollar in a week.
Police fired tear gas to disperse the demonstrators, angered by the drop .
Protesters shouted slogans against President Mahmoud Ahmadinejad, saying his economic policies had fuelled the economic crisis.
The rial has been plunging to record lows as economic sanctions imposed over Iran's disputed nuclear programme have slashed Iran's export earnings from oil, undermining the central bank's ability to support the currency.
Panicking Iranians have scrambled to buy hard currencies, pushing down its value.
With Iran's official inflation rate running at around 25%, the currency's weakness is hurting living standards and threatens to worsen a recent spate of job losses in Iran's industrial sector.
Tehran's main bazaar, one of the city's major shopping areas, was closed today.
