The unrest happened today in Baneh, which is near the Iraqi border and its semi-autonomous Kurdish region.
A report by yjc.Ir, which is affiliated with state television, said five border guards were arrested after the protests with the aim of calming tensions.
Baneh is some 670 kilometers (400 miles) west of the capital, Tehran.
Iran's Kurdish region has seen recent attacks by separatists emboldened by Kurds seizing ground in Iraq and Syria amid the war on the Islamic State group.
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