ISIS beheaded 21 Egyptian Coptic Christians kidnapped in December and January in a video filmed on a Libyan beach. In response, Egypt launched airstrikes targeting ISIS camps, weapons caches, and training areas in Derna, Libya, killing around 64 ISIS fighters including 3 leaders. The Libyan Air Force also participated in the airstrikes against ISIS targets in Libya, though the relationship between ISIS in Libya and the group in Syria/Iraq remains unclear.