( CNN ) Iraqi and U.S.-led coalition forces have successfully ousted ISIS from the nation 's largest oil refinery , the coalition said Sunday . Iraqi security forces regained full control of the Baiji refinery , the Combined Joint Task Force said . A week ago , ISIS claimed it controlled part of the facility , posting images online that purported to back up the claim . Iraq is working to fortify the facility 's defenses , the task force said in a statement . Over the past nine days , the coalition conducted 47 airstrikes in the area , the statement said . Meanwhile , Peshmerga forces -- also with the assistance of coalition strikes -- cleared 84 square kilometers ( 32 square miles ) of ISIS-occupied territory in Iraq on Saturday , the Kurdistan Region Security Council said . The Peshmerga are the national military force of Kurdistan . `` Front-line reporting indicates at least 35 ISIS terrorists were killed during the offensive , '' the council said in a statement . The goal was to push back ISIS and `` diminish its ability to threaten the security of Kirkuk province , '' the statement said . `` This success follows an offensive south and west of Kirkuk '' last month in which 100 square kilometers ( 39 square miles ) of terrain was cleared , the council said .
Iraqi and U.S.-led coalition forces claim they captured a key refinery from ISIS . Peshmerga rebels also claim retaking terrain from ISIS .