New information suggests that leaks of details could endanger President Barack Obama’s strategy against ISIS.

After details of the attempted James Foley rescue mission were released by the administration, a military source says that intelligence information suggests that ISIS has spread out its remaining hostages and doubled up guards.

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Two separate sources confirm that the release of information was damaging because it was considered an ongoing mission. State Department deputy spokesperson Marie Harf said that media outlets had forced the administration to acknowledge the mission.

Meanwhile, the National Security Council spokesperson said it would not be commenting further on intelligence matters.