Various news agencies, including the Washington Post, are reporting the Islamic State militant group claimed today to have beheaded an American photojournalist in retaliation for U.S. airstrikes in Iraq.

A video released online purportedly shows the execution of James Foley.

NewsRadio KFBK has chosen not to post or link out the video of Foley's killing, but in the video, entitled "A Message to #America (from the #IslamicState)" terrorists force Foley to read a letter urging Americans to rise up against his "real killer, the U.S. government."

Foley also says in the video that the U.S. airstrikes against ISIS "hammered the final nail into [his] coffin."

U.S. intelligence officials said they were still evaluating the video and could not immediately authenticate it.

Foley was working in Syria for the Boston-based news Web site Global­Post when he disappeared in November 2012.