U.S. officials have confirmed the authenticity of a gruesome video in which an ISIS terrorist beheaded American journalist James Foley. U.S. officials tell AP they believe that it was Foley on the tape:

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Two U.S. officials say they believe American journalist James Foley was the victim executed by Islamic State militants as shown in a grisly video released Tuesday.

Separately, Foley's family confirmed his death in a statement posted on a webpage that was created to rally support for his release.

In the statement, Foley's mother, Diane Foley, said the journalist, quote, "gave his life trying to expose the world to the suffering of the Syrian people."

One of the U.S. officials said President Barack Obama was expected to make a statement about the killing on Wednesday.

The U.S. officials spoke on condition of anonymity because they were not authorized to discuss the video by name.

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It's not clear whether the execution took place in Iraq or Syria. A second U.S. journalist, identified as American Steven Sotloff, also appeared in the YouTube video.

ISIS threatened to also kill Sotloff, who disappeared while covering the Syrian war a year ago. ISIS said Sotloff's fate depends on Obama's "next decision."

In a phone interview this morning, Bill O'Reilly called on President Obama to take even stronger action against ISIS, beyond just the airstrikes in northern Iraq.

"We have to wipe out ISIS. Every American should know this. We have to kill them all. They're not gonna give up. They're not gonna stop murdering innocent people. We have to get them. That's it. And there's nobody else on the planet [that's] gonna do it," he told Bill Hemmer.

O'Reilly, who interviewed Foley in 2011, remembered him as a "brave guy" who was willing to cover dangerous areas that most reporters would not.

"He did work that other journalists wouldn't do. I wouldn't do it. I've covered four wars and I've been in bad situations. I almost lost my life in the Falklands War. But I wouldn't do what Foley did, he was a very brave guy," said O'Reilly.

The "Factor" host said what bothers him most is the left-wing media's portrayal of ISIS, noting that most of the press refers to ISIS as "Sunni militants" as part of an effort to "diminish the terror threat."

"They've been dishonest about ISIS from the very beginning, the American press has. Whereas I've been pounding that story, telling President Obama he's got to get these people. Finally he does and now we see their true nature," said O'Reilly, adding that today's New York Times has a story about Foley's execution on A6, not the front page.

O'Reilly also called out YouTube for allowing the video, which has since been taken down, to be posted on the site.

Watch the analysis above, and tune in for a must-see O'Reilly Factor, tonight at 8p ET as Bill returns from his vacation early to cover Ferguson and the ISIS threat.

In the video below, watch the May 2011 interview with Foley following his kidnapping in Libya.

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