U.S. President Barack Obama delivers a statement on the recent air strikes against ISIS on the South Lawn of the White House in Washington, D.C., on Sept. 23, 2014
Win McNamee—Getty Images
September 24, 2014 6:16 PM EDT

The U.S. and partner forces launched additional strikes in Syria against the Islamic State of Iraq and Greater Syria (ISIS) on Wednesday, the Pentagon said. Forces from the U.S., Saudi Arabia and the United Arab Emirates reportedly launched 13 air strikes against 12 oil refineries controlled by the Islamist group.

“We are still assessing the outcome of the attack on the refineries, but have initial indications that the strikes were successful,” U.S. Central Command said Wednesday. “Producing between 300-500 barrels of refined petroleum per day, [ISIS] is estimated to generate as much as $2 million per day from these refineries. The destruction and degradation of these targets further limits [ISIS’s] ability to lead, control, project power and conduct operations.”

The strikes are a part of the U.S.’s ongoing effort to “degrade and destroy” ISIS, which has claimed responsibility for beheading two American journalists and one British aid worker, among other Western casualties. During a speech at the U.N. General Assembly on Wednesday, President Barack Obama called on more American allies to join in the fight to “dismantle this network of death.”

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