Two 2,000-pound bombs struck a facility, destroying ‘millions’ of dollars worth of cash from oil, looting and extortion.

A U.S.-led coalition air strike has destroyed a cash storage facility used by ISIS militants in the Iraqi city of Mosul, a U.S. defense official said Monday.

Two 2,000-pound bombs struck the facility, destroying “millions” of dollars worth of cash, the official told Agence France-Presse, speaking on condition of anonymity.

“We estimate in the millions of dollars… from all their illicit stuff: oil, looting, extortion,” the official said. The strike came early Monday.

CNN, which first reported the strike, said the U.S. military believed between five and seven civilians had been killed.

The U.S.-led coalition carrying out plane and drone strikes against ISIS in Iraq and Syria has been increasingly targeting the militants’ money-making capabilities, including by bombing trucks that ferry illicit oil across Syria.

Under pressure from critics who say the campaign is moving too slowly, the Pentagon has indicated it would consider a wider array of targets even if these might cause civilian deaths, provided these attacks yield significant gains against the jihadists.

The defense official said the coalition had targeted cash-holding facilities once or twice in the past year, but the most recent action was “probably” the biggest to date.

It was not immediately clear if the money had been in U.S. dollars, some other foreign currency, or local dinars, the official added.

Related articles across the web

• US to pull some warplanes out of Turkey
• Obama Refuses to Alter ISIS Strategy
• The Challenge of Selling 'Stay the Course'
• You Want War? Russia Is Ready For War
• Obama Visits Pentagon To Highlight Ongoing Fight Against ISIS
• Pentagon Report Admits That the Security Situation in Afghanistan Has Deteriorated Badly in Last Half of 2015
• Obama says No 'Specific' Terror Threat to US, But Calls for Vigilance
• U.S. withdraws 12 fighter jets from base in Turkey: military
• Libya: US Special Forces land at Wattayah airbase west of Tripoli
• Afghan security worse in second part of 2015: Pentagon