The Pentagon has released footage purporting to show its recent bombing of a Daesh (ISIL) cash storage in Iraq that blew up millions of the terror group’s dollars.

The video, first published by CNN on Friday, has no sound and begins moments before two 2,000-pound (900-kilogram) bombs struck the building in the Daesh-held Iraqi city of Mosul, on January 11.

After the explosion, clouds of what appears to be paper money are seen flying around in the air and scattering on top of the roofs of nearby buildings.

US Defense Department officials did not specify how much money was there or in what currency, but described it as "millions."

"It was a good strike. And we estimate that it served to deprive ISIL of millions of dollars," General Lloyd Austin, head of the US Central Command, said of the strike.

"ISIL needs those funds to pay their fighters, to recruit new fighters and to conduct their various maligned activities," the senior commander added.

Washington regarded the strike as extremely sensitive, since the building was situated in an area inhabited by civilians. However, one official said that the US was willing to risk up to 50 civilian causalities in this area just to destroy the building.

It was not clear how the US learned of the location, but according to military officials, after gaining intelligence on the so-called "cash collection and distribution point," the American aircraft and drones monitored the site for days in order to determine when the number of civilians would be the lowest.

Since August 2014, Washington and some of its allies have been conducting airstrikes against what they call Daesh positions in Iraq and later on Syria.

US military officials acknowledge that these airstrikes have caused huge collateral damage, and civilian deaths.

Latest data released by the US military shows that there have been 9,627 US-led coalition air strikes as of January 13, with 6,393 in Iraq and 3,234 in Syria.

The US Central Command said in a statement on Friday that five separate US airstrikes on Daesh targets in Syria and Iraq between April 12 and July 4 last year left eight civilians killed and three others wounded.