Only hours later, David Cameron, UK prime minister, told the UN General Assembly that Britain should join the US-led air strikes against the IS in Iraq, adding that his country's parliament has been recalled to secure approval.
"I am therefore recalling the British parliament on Friday to secure approval for the UK to take part in international air strikes against the IS in Iraq," Cameron told the 193-member UN General Assembly.
Oil refineries hit
In its statement on Wednesday, the US Central Command said there were a total of 13 strikes against 12 modular oil refineries controlled by IS fighters as well as another strike that destroyed an IS vehicle.
"We are still assessing the outcome of the attack on the refineries, but have initial indications that the strikes were successful," the Central Command said.
Modular refineries are prefabricated and constructed off-site so they can be transported and made operational quickly. The US military said the refineries were capable of producing millions in revenue and provided fuel for the group's operations.
"These small-scale refineries provided fuel to run [IS] operations, money to finance their continued attacks throughout Iraq and Syria, and an economic asset to support their future operations," the military said.
It is unclear how much crude or refined oil the IS is managing to sell. The group is producing less than 100,000 barrels of crude oil a day, Adam Sieminski, head of the US Energy Information Administration, said on Wednesday.