The strikes come after ISIS posted a new online video purporting to show the execution of 21 Egyptian Christians.
Although Egypt is considered a member of the coalition, officials say these strikes in Libya were not in any way coordinated with coalition leadership and Operation Inherent Resolve.
"This was not a coalition strike," a senior defense official told ABC News. "This was a decision made by the Egyptian government and I have seen no indication the U.S. was involved in any way."
Senior officials say they were also unaware of any prior warning the Egyptians may have given to the U.S. before striking ISIS targets in Libya.
U.S. officials have been unable to provide any assessment of how effective the Egyptian strikes in Libya may have been.
Senior military commanders have warned in recent months of signs that ISIS attempting to gain influence inside Libya, but at this point there is no plan to begin hitting targets there. As one official put it, " We don’t think there is very much there."
Yet other counterterrorism officials in Washington caution that although ISIS may not have a unified network of militants inside Libya, they do have a significant number of supporters and sympathizers in Libya, that along with other violent extremists there, pose a serious security threat inside the country.