A previous version of the story incorrectly included Steven Sotloff in the headline when, in fact, it was only James Foley who was beheaded at the time of publication. ISIS had threatened to behead Steven Sotloff next.
More beheading of journalists are feared to be happening following threat from the Islamic State militant of drowning all Americans in blood as an estimated number of 20 journalists are still missing in Syria.
On Tuesday, the ISIS posted an unnerving video threatening that they will drown all of Americans in blood. The video features a blood-spattered Star and Stripes flag side by side to the jihadist flag. The video also showed photo of one American who was beheaded during the U.S.' invasion of Iraq and photos of victims shot by snipers (see video below).
The video was released following President Barack Obama's announcement of "a major step forward" as U.S. troops were able to recapture the Mosul Dam from the rebel group.
On Wednesday, ISIS posted a graphic video showing the beheading of American journalist James Foley. The video ended with a threat of beheading another American journalist Steven Sotloff depending on U.S.' next steps against ISIS.
An estimated number of 20 journalists are still missing in Syria, according to The Committee to Protect Journalists (CPJ).
It had been confirmed that among these journalists missing is another American, Austin Tice, a freelancer reporting to The Washington Post. He disappeared in Syria in August 2012. There had been no known information after his kidnapping.
American or not, Syria, had been the most dangerous country for journalists for more than two years now, CPJ said. Through the years, 69 journalists were already killed in the conflict and 80 were kidnapped. These figures exclude victims of the on-going abductions which information are not publicized. It is difficult to know exactly how many, CPJ said.
CPJ is also condemning the beheading done to James Foley.
"The barbaric murder of journalist James Foley, kidnapped in Syria and held almost two years, sickens all decent people. Foley went to Syria to show the plight of the Syrian people, to bear witness to their fight, and in so doing to fight for press freedom. Our hearts go out to his family, who had dedicated themselves to finding and freeing Jim," CPJ Chairman Sandra Mims Rowe.
Foley was kidnapped on Nov 22, 2012 in northwest Syria. Gunmen reportedly forced him into a vehicle and no information was known after. He was reporting for U.S. online news portal, the Global Post.
Meanwhile, U.S. National Security Council spokeswoman Caitlin Hayden released an official statement saying that the intelligence community is already working to determine the authenticity of the video of Foley.
"We have seen a video that purports to be the murder of U.S. citizen James Foley by (ISIS). The intelligence community is working as quickly as possible to determine its authenticity. If genuine, we are appalled by the brutal murder of an innocent American journalist and we express our deepest condolences to his family and friends. We will provide more information when it is available."
White House spokesman Eric Schultz said that Mr Obama was already briefed about the video and will continue to receive regular updates.