British Aid Worker Beheaded

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  Widow of Beheaded Islamic State Hostage Brands Killers 'Monsters'

  The widow of British aid worker David Haines, who was taken hostage and beheaded by Islamic State militants, branded his killers inhuman monsters in her first television interview broadcast Sunday.

• Frenchman Seen in Islamic State Video of Beheadings

  A Frenchman is believed to have been among Islamic State jihadists appearing on a video showing the severed head of US aid worker Peter Kassig, but a British man denied earlier reports his medical student son was there too.

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  British Prime Minister David Cameron 'Horrified' by Peter Kassig's Beheading

  British Prime Minister David Cameron said on Sunday he was "horrified" after the Islamic State jihadist group claimed to have executed US aid worker Kassig, known as Abdul-Rahman after converting to Islam.

• Families of Slain UK Aid Workers Call for Unity

  Families of two British aid workers killed by the Islamic State group in Syria on Saturday urged people of all faiths to unite against the militants' "hateful acts."

• Alan Henning, Ex-Taxi Driver Anxious to Help in Syria, Killed by Islamic State

  British aid worker Alan Henning travelled to Syria to help victims of a vicious civil war but became himself a casualty of the conflict's brutality at the hands of Islamic State fighters.

• British PM Confirms 'Brutal Murder' of Alan Henning by Islamic State Group

  British Prime Minister David Cameron confirmed the "brutal murder" of aid worker Alan Henning by the Islamic State group on Friday and vowed to bring his killers to justic

• US Has Identified Masked Man in Beheading Videos

  The US believes it has identified the British-accented masked man in the videos depicting the beheadings of two American journalists and a British aid worker, the FBI director says.

• UN Security Council Blasts 'Heinous' Murder of British Aid Worker

  The UN Security Council on Sunday condemned the "heinous and cowardly murder" of British aid worker David Haines by an Islamic State militant.

• Britain Mourns Slain Hostage; Another Under Threat

  British aid worker David Haines has been beheaded - like two American journalists before him - and the Islamic State group is threatening to kill a fourth captive.

• UN Security Council Blasts 'Heinous' Murder of British Aid Worker

  The UN Security Council on Sunday condemned the "heinous and cowardly murder" of British aid worker David Haines by an Islamic State militant.