The British Ambassador to the U.S. says that intelligence officials are "close" to identifying the ISIS member who beheaded U.S. journalist James Foley in the video that was sent. On Meet The Press, the Ambassador noticed that the ISIS agent had a British accent:

"We're not in a position to say exactly who this is," said Sir Peter Westmacott on NBC's "Meet the Press," but "I think we are close.” Westmacott said "sophisticated" voice recognition technology was being used to identify the man who appeared in the video, but he also stressed that the threat of British nationals in ISIS goes beyond one killer.

"It’s not just about one brutal murderer," Westmacott said. British intelligence estimates that about 500 Britons have joined ISIS, meaning they have the means to return to Britain or fly to America with few hindrances. "It is a threat to our citizens," Westmacott said.

A U.S. Department of Justice official told NBC News that investigators were using “all of the tools at our disposal” to hold Foley’s killers “accountable,” but the official would not say whether or not any suspects had been identified.”