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US watchdog: extremists linked to Islamic State group have killed French hostage in Algeria

  • In this still image from video published on the Internet on Wednesday, Sept. 24, 2014, by a group calling itself Jund al-Khilafah, or Soldiers of the Caliphate, members of the group stand behind French mountaineer Herve Gourdel just before beheading him. In the video, the men pledge their allegiance to the leader of the Islamic State group, Abu Bakr al-Baghdadi, before killing Gourdel, 55, who they abducted on Sunday, Sept. 21. (AP Photo)

    In this still image from video published on the Internet on Wednesday, Sept. 24, 2014, by a group calling itself Jund al-Khilafah, or Soldiers of the Caliphate, members of the group stand behind French mountaineer Herve Gourdel just before beheading him. In the video, the men pledge their allegiance to the leader of the Islamic State group, Abu Bakr al-Baghdadi, before killing Gourdel, 55, who they abducted on Sunday, Sept. 21. (AP Photo)  (The Associated Press)

  • French President Francois Hollande speaks at the UN Security Council summit on foreign terrorist, Wednesday, Sept. 24, 2014, at the United Nations headquarters. (AP Photo/Pablo Martinez Monsivais)

    French President Francois Hollande speaks at the UN Security Council summit on foreign terrorist, Wednesday, Sept. 24, 2014, at the United Nations headquarters. (AP Photo/Pablo Martinez Monsivais)  (The Associated Press)

  • Algerian military trucks are pictured in the Tizi Ouzou region, northern Algeria, on Wednesday, Sept. 23, 2014, as troops conduct search operations in the bid to find French hostage, Herve Gourdel, who was kidnapped by militants. The Algerian extremists allied with the Islamic State group have decapitated a French hostage after France carried out airstrikes in Iraq, according to a video that appeared online Wednesday. French President Francois Hollande condemned the killing of Herve Gourdel and said France would continue its fight against the Islamic State group, which are Sunni militants that have taken over large swaths of Iraq and Syria. (AP Photo)

    Algerian military trucks are pictured in the Tizi Ouzou region, northern Algeria, on Wednesday, Sept. 23, 2014, as troops conduct search operations in the bid to find French hostage, Herve Gourdel, who was kidnapped by militants. The Algerian extremists allied with the Islamic State group have decapitated a French hostage after France carried out airstrikes in Iraq, according to a video that appeared online Wednesday. French President Francois Hollande condemned the killing of Herve Gourdel and said France would continue its fight against the Islamic State group, which are Sunni militants that have taken over large swaths of Iraq and Syria. (AP Photo)  (The Associated Press)

A terrorism watchdog says Algerian extremists allied with the Islamic State group have killed a French hostage.

A group calling itself Jund al-Khilafah said after abducting Herve Gourdel on Sunday that he would be killed within 24 hours unless France ended its airstrikes against Islamic State fighters in Iraq. The French government has insisted it will not back down.

U.S. terrorism watchdog SITE Intelligence Group says Jund al-Khilafah released a video online Wednesday saying Gourdel has been killed. He was a 55-year-old mountaineering guide from Nice. The French government would not immediately comment.