U.S. officials tell Fox News that they are aware of a video in which ISIS terrorists claim they have beheaded American journalist James Foley.

Catherine Herridge confirms that the intelligence community is performing careful analysis to verify the authenticity of the video. She said that will involve voice analysis, looking at the location of the video, and understanding the credibility of the person who posted it to social media.

These terrorist groups do not have a track record of posting fake tapes, Herridge said.

Herridge: ISIS Outing Intelligence Agents on Social Media

Foley, a U.S. photojournalist, was kidnapped in Syria in 2012.

Read more below from FoxNews.com:

The release of the video allegedly showing his death comes amid a U.S. airstrike campaign against Islamic State targets in Iraq. The group, formerly known as the Islamic State of Iraq and Syria, has declared an Islamic state in the territory it controls in Iraq and neighboring Syria, imposing its harsh interpretation of Islamic law.

Foley, a freelance journalist from Rochester, New Hampshire, vanished in Syria in November 2012 while covering the Syrian civil war for GlobalPost. The publication "mounted an extensive international investigation" for his whereabouts, with the search extending throughout the Middle East, along the Syria-Turkish border, in Lebanon, Jordan and other locations, GlobalPost wrote on its site Tuesday.