Iran rial
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Cross border trade halted by Iranian currency collapse

3 October 2012 Last updated at 15:47 BST

As riot police clash with protesteres in Tehran, the collapse in the value of the currency has had a dramtic impact on cross border trade between Iran and Turkey.

The rial has plummeted to record lows against the US dollar in recent days.

James Reynolds reports from the Turkish-Iranian border where trade between the two nations has come to a halt.