The Iranian rial has plummeted to a record low against the dollar, according to currency-tracking websites, as a US naval blockade of the country’s ports continued, AFP reports.

On the black market, the rial was trading at around 1.80 million rials against the dollar, the Bonbast and AlanChand websites reported. When the war erupted two months ago, one dollar was traded at about 1.70m rials.

Iran officially has several fixed exchange rates, but the two websites are generally used as benchmarks for unofficial rates.