A US-led coalition air strike today destroyed a cash storage facility used by Islamic State jihadists in the Iraqi city of Mosul, a US defense official said.

Two 2,000-pound (900-kilogram) bombs struck the facility, destroying "millions" of dollars worth of cash, the official said, speaking on condition of anonymity.

"We estimate in the millions of dollars... From all their illicit stuff: oil, looting, extortion," the official said.