The Pentagon has spent as much as $1.1 billion on U.S. military operations against the Islamic State in Iraq and Syria (ISIS) since operations began in mid-June, according to The Associated Press.
That includes $62 million in Navy airstrikes and Tomahawk cruise missiles that have been fired against ISIS militants, according to U.S. Central Command statistics released Monday.
The Pentagon has previously said it is spending between $7 million and $10 million per day on the campaign. The AP came up with the $1.1 billion calculation based on that estimate.
So far, U.S. forces have carried out more than 266 airstrikes in Iraq. In Syria, there have been more than 103 airstrikes.
On Tuesday, The Wall Street Journal reported that a barrage of airstrikes, believed to be by the United States and allies, were carried out near Kobani, a Kurdish city in Syria near the border with Turkey.
The Pentagon has declined to give an exact figure for the cost of operations against ISIS, but said the cost is an average of $7 million to $10 million per day, since June.
The figures include more than 1,300 U.S. troops in Iraq training and advising Iraqi and Kurdish forces, providing intelligence and other support, and protecting diplomatic personnel and property.
The $1.1 billion estimate given by the AP does not include partner nation costs.
The Air Force has dropped 955 munitions in the campaign, while the Navy has dropped 185, including 47 Tomahawk missiles targeting the Khorasan Group, an al Qaeda cell in Syria.
Officials say that group remains a threat to the U.S. and have not said whether any of its leaders has been killed in the strikes.
This story was updated at 11:54 a.m.