CNN reports that officials have a 'pretty good idea' who Foley's killer is

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Two U.S. officials have led CNN to believe that U.S. law enforcement may have identified James Foley's killer, who they believe is currently in Syria.

The official, who spoke on condition of anonymity, said they'd been using 'all means' to identify the masked man in the ISIS video, including voice analysis and metadata analyzation among other methods.


According to CNN's report, FBI agents believe the subject is tied to a group of extremists based in London.

Though the official cautioned that 'it's not 100 percent yet,' he said, 'they have a pretty good idea of who it may be.'

File Photo Of US Journalist Steven Sotloff Held Hostage By Extremists

Authorities are reportedly still trying to determine whether the masked man speaking in the video of Steven Sotloff's death is the same knife-wielding militant in the Foley video, adding that it was 'too premature' to know.

[Slideshows below contain images of Foley's funeral as well as a mourning ceremony for Sotloff:]

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CNN reports that officials have a 'pretty good idea' who Foley's killer is
ROCHESTER, NH - AUGUST 24: People attend a special mass in remembrance of journalist James Foley at Our Lady of the Rosary Church for August 24, 2014 in Rochester, New Hampshire. Foley was recently executed by ISIS Islamic militants in Syria, with the militants reportedly saying it was is retaliation for U.S. airstrikes In Iraq. (Photo by Darren McCollester/Getty Images)
ROCHESTER, NH - AUGUST 24: People attend a special mass in remembrance of journalist James Foley at Our Lady of the Rosary Church for August 24, 2014 in Rochester, New Hampshire. Foley was recently executed by ISIS Islamic militants in Syria, with the militants reportedly saying it was is retaliation for U.S. airstrikes In Iraq. (Photo by Darren McCollester/Getty Images)
Parishioners wait to greet the family of James Foley after a Catholic mass at Our Lady of the Holy Rosary Parish August 24, 2014 in Rochester, New Hampshire. The family and friends of murdered US journalist James Foley attended the memorial mass, offering prayers for the safety of his fellow hostages in Syria.  AFP PHOTO/DOMINICK REUTER (Photo credit should read DOMINICK REUTER/AFP/Getty Images)
A parishioner holds a prayer card in memory of James Foley after a Catholic mass at Our Lady of the Holy Rosary parish August 24, 2014, in Rochester, New Hampshire. The family and friends of murdered US journalist James Foley attended the memorial mass and offered prayers for the safety of his fellow hostages in Syria. AFP PHOTO/DOMINICK REUTER (Photo credit should read DOMINICK REUTER/AFP/Getty Images)
Diane and John Foley, parents of James Foley, address the congregation during a Catholic mass at Our Lady of the Holy Rosary parish August 24, 2014, in Rochester, New Hampshire. The family and friends of murdered US journalist James Foley attended the memorial mass and offered prayers for the safety of his fellow hostages in Syria. AFP PHOTO/DOMINICK REUTER (Photo credit should read DOMINICK REUTER/AFP/Getty Images)
A parishioner walks past a display of photos of James Foley before a Catholic mass at Our Lady of the Holy Rosary Parish August 24, 2014 in Rochester, New Hampshire. The family and friends of murdered US journalist James Foley are attending the memorial mass and offering prayers for the safety of his fellow hostages in Syria.  AFP PHOTO/DOMINICK REUTER (Photo credit should read DOMINICK REUTER/AFP/Getty Images)
Parishioners walk past a display of photos of James Foley before a Catholic mass at Our Lady of the Holy Rosary Parish August 24, 2014 in Rochester, New Hampshire. The family and friends of murdered US journalist James Foley are attending the memorial mass and offering prayers for the safety of his fellow hostages in Syria.  AFP PHOTO/DOMINICK REUTER (Photo credit should read DOMINICK REUTER/AFP/Getty Images)
John Foley, father of James Foley, greets supporters after a Catholic mass at Our Lady of the Holy Rosary parish August 24, 2014, in Rochester, New Hampshire. The memorial service was held for James Foley, a US journalist beheaded by Islamic State fighters after he was kidnapped in Syria in November. AFP PHOTO/DOMINICK REUTER (Photo credit should read DOMINICK REUTER/AFP/Getty Images)
John Foley, father of James Foley, greets supporters after a Catholic mass at Our Lady of the Holy Rosary parish August 24, 2014, in Rochester, New Hampshire. The memorial service was held for James Foley, a US journalist beheaded by Islamic State fighters after he was kidnapped in Syria in November .AFP PHOTO/DOMINICK REUTER (Photo credit should read DOMINICK REUTER/AFP/Getty Images)
ROCHESTER, NH - AUGUST 24: People leave the Our Lady of the Rosary Church after a special mass in remembrance of James Foley for August 24, 2014 in Rochester, New Hampshire. Foley was recently executed by ISIS Islamic militants in Syria, with the militants reportedly saying it was is retaliation for U.S. airstrikes In Iraq. (Photo by Darren McCollester/Getty Images)
ROCHESTER, NH - AUGUST 24: Diane Foley receives a hug following a special mass in remembrance of her son James Foley at Our Lady of the Rosary Church for August 24, 2014 in Rochester, New Hampshire. Foley was recently executed by ISIS Islamic militants in Syria, with the militants reportedly saying it was is retaliation for U.S. airstrikes In Iraq. (Photo by Darren McCollester/Getty Images)
ROCHESTER, NH - AUGUST 24: People leave the Our Lady of the Rosary Church after a special mass in remembrance of James Foley for August 24, 2014 in Rochester, New Hampshire. Foley was recently executed by ISIS Islamic militants in Syria, with the militants reportedly saying it was is retaliation for U.S. airstrikes In Iraq. (Photo by Darren McCollester/Getty Images)
Diane and John Foley, parents of journalilst James Foley, sit for a portrait at their home during an interview August 24, 2014, in Rochester, New Hampshire. A memorial service will be held later August 24 for Foley, a US journalist beheaded by Islamic State fighters after he was kidnapped in Syria in November. AFP PHOTO/DOMINICK REUTER (Photo credit should read DOMINICK REUTER/AFP/Getty Images)
ROCHESTER, NH - AUGUST 24: People leave the Our Lady of the Rosary Church after a special mass in remembrance of James Foley August 24, 2014 in Rochester, New Hampshire. Journalist James Foley was recently executed by Islamic militants. (Photo by Darren McCollester/Getty Images)
ROCHESTER, NH - AUGUST 24: John (2nd L) and Diane Foley (2nd R) greet people following a special mass in remembrance of their son James Foley at Our Lady of the Rosary Church for August 24, 2014 in Rochester, New Hampshire. Foley was recently executed by ISIS Islamic militants in Syria, with the militants reportedly saying it was is retaliation for U.S. airstrikes In Iraq. (Photo by Darren McCollester/Getty Images)
EDGARTOWN, MA - AUGUST 20: (AFP OUT) U.S. President Barack Obama makes a statement about the execution of American journalist James Foley by ISIS terrorists in Iraq during a press briefing at the press filing center at the Edgartown School August 20, 2014 in Edgartown, Martha's Vineyard, Massachusetts. A video released shows an ISIS militant beheading Foley in what is believed to be retaliation for U.S. airstrikes in Iraq. The militant then threatens the life of another American hostage, Steven Sotloff, who is also missing. (Photo by Rick Friedman-Pool/Getty Images)
Diane Foley, mother of James Foley, pauses for a moment during an interview at her home August 24, 2014, in Rochester, New Hampshire. A memorial service will be held later August 24 for Foley, a US journalist beheaded by Islamic State fighters after he was kidnapped in Syria in November. AFP PHOTO/DOMINICK REUTER (Photo credit should read DOMINICK REUTER/AFP/Getty Images)
ROCHESTER, NH - AUGUST 24: A picture stands at Our Lady of the Rosary Church for a special mass in remembrance of journalist James Foley August 24, 2014 in Rochester, New Hampshire. Foley was recently executed by ISIS Islamic militants in Syria, with the militants reportedly saying it was is retaliation for U.S. airstrikes In Iraq. (Photo by Darren McCollester/Getty Images)
ROCHESTER, NH - AUGUST 24: People attend a special mass in remembrance of journalist James Foley at Our Lady of the Rosary Church for August 24, 2014 in Rochester, New Hampshire. Foley was recently executed by ISIS Islamic militants in Syria, with the militants reportedly saying it was is retaliation for U.S. airstrikes In Iraq. (Photo by Darren McCollester/Getty Images)
ROCHESTER, NH - AUGUST 24: People attend a special mass in remembrance of journalist James Foley at Our Lady of the Rosary Church for August 24, 2014 in Rochester, New Hampshire. Foley was recently executed by ISIS Islamic militants in Syria, with the militants reportedly saying it was is retaliation for U.S. airstrikes In Iraq. (Photo by Darren McCollester/Getty Images)
ROCHESTER, NH - AUGUST 24: Pictures stand at Our Lady of the Rosary Church for a special mass in remembrance of journalist James Foley August 24, 2014 in Rochester, New Hampshire. Foley was recently executed by ISIS Islamic militants in Syria, with the militants reportedly saying it was is retaliation for U.S. airstrikes In Iraq. (Photo by Darren McCollester/Getty Images)
ROCHESTER, NH - AUGUST 24: People enter Our Lady of the Rosary Church for a special mass in remembrance of journalist James Foley August 24, 2014 in Rochester, New Hampshire. Foley was recently executed by ISIS Islamic militants in Syria, with the militants reportedly saying it was is retaliation for U.S. airstrikes In Iraq. (Photo by Darren McCollester/Getty Images)
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CNN reports that officials have a 'pretty good idea' who Foley's killer is
ORLANDO, FL - SEPTEMBER 03: Rabbi Chaim Lipskier (L) and University of Central Florida students attend a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida students hold candles during a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: Rabbi Chaim Lipskier (L) speachs during a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida students Melissa Catalanotto (L) , President of the UCF Society of Professional Journalists attends a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida students attends a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: Rabbi Chaim Lipskier (L) speachs during a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida students Melissa Catalanotto (L) , President of the UCF Society of Professional Journalists attends a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida students Jonell Gregor and Maleah McLean hold candles during a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida student Jessica Gottsleben (R), Senior Broadcast Journalism attends a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: Rabbi Chaim Lipskier (L) speachs during a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida students hold candles during a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: Rabbi Chaim Lipskier (L) speachs during a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida students attends a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida student Gretzel Baines holds a candle during a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida students Melissa Catalanotto (L) , President of the UCF Society of Professional Journalists and Jessica Gottsleben (R), Senior Broadcast Journalist hold candles during a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida students Alastair Baines and Johanna Hauck hold candles during a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: Syrian residents in Orlando, Florida Hasan Hayri (L), Bushra Kalani (C) and Sarah Nyrbeah attend a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida students Shannon Payne and Jill Dutmers hold candles during a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. ( (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: Syrian residents in Orlando, Florida Hasan Hayri (L), Bushra Kalani (C) and Sarah Nyrbeah attend a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida students hold candles during a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
ORLANDO, FL - SEPTEMBER 03: University of Central Florida students attends a candle light vigil held for journalist Stephen Sotloff on September 3, 2014 at the University of Central Florida in Orlando, Florida. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Photo by Gerardo Mora/Getty Images)
MISRATA, LIBYA - JUNE 02: In this handout image made available by the photographer American journalist Steven Sotloff (Center with black helmet) talks to Libyan rebels on the Al Dafniya front line, 25 km west of Misrata on June 02, 2011 in Misrata, Libya. Sotloff was kidnapped in August 2013 near Aleppo, Syria and was recently shown on a jihadist video in which fellow US journalist James Foley was executed. In the video the militant form the Islamic State (IS) threatens to kill Sotloff next if the US continues its aerial campaign against the insurgency. (Photo by Etienne de Malglaive via Getty Images)
Media gather outside the home of Steven Sotloff's parents in Pinecrest, Fla., on Tuesday, Sept. 2, 2014. Sotloff, a journalist taken captive in Syria, was murdered by Islamic fundamentalists in a video released Tuesday. (Patrick Farrell/Miami Herald/MCT via Getty Images)
MISRATA, LIBYA - JUNE 02: In this handout image made available by the photographer American journalist Steven Sotloff (Center with black helmet) talks to Libyan rebels on the Al Dafniya front line, 25 km west of Misrata on June 02, 2011 in Misrata, Libya. Sotloff was kidnapped in August 2013 near Aleppo, Syria and was recently shown on a jihadist video in which fellow US journalist James Foley was executed. In the video the militant form the Islamic State (IS) threatens to kill Sotloff next if the US continues its aerial campaign against the insurgency. (Photo by Etienne de Malglaive via Getty Images)
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