Riot police in Iran have clashed with protesters in the capital over sharp falls in the currency, the rial.
Tear gas was used to disperse the demonstrators, some of whom were setting fire to tyres and rubbish bins. There were many arrests, reports say.
Eyewitnesses told the BBC that scores of people gathered outside the central bank, calling for the governor to stand down, chanting anti-government slogans.
The rial has plummeted to record lows against the US dollar in recent days.
Money dealers were joined by traders from the nearby central bazaar, reports say.
Eyewitnesses told BBC Persian that riot police fired tear gas to disperse the crowds.
Reports say many shops in the central Grand Bazaar have brought down their shutters in sympathy with the demonstrators.
Traders are angry at the lack of direction from the government in the crisis, which they say has led to more instability in prices, making trading almost impossible, commentators say.
A Facebook user, FreedomMessenger20, is documenting the anti-regime protest in Tehran today:
Protesters calling on store-owners in the bazaar to close their shops:
(h/t Tundra Tabloids)