Watch | US airstrike destroys ‘millions’ at IS cash center

The US Defense Department has released a video showing the bombing of an Islamic State cash stockpile in Mosul, Iraq.

The black-and-white video begins with an overhead shot of the building in Mosul, which is the militants' main stronghold in Iraq. The facility is then hit with two 2,000-pound bombs.

Clouds of paper -- which the Pentagon says is cash -- are seen floating above the bombing site after the airstrikes.

The officials said Monday that millions of dollars was destroyed, but the exact amount is unknown.