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.