IRAQ NEEDS HELP (WARNING: GRAPHIC PIX)

[Duchess]

Those savages have beheaded another person, a Brit this time -

Islamic State extremists have released a video showing the beheading of British captive David Haines.

The father-of-two, an aid worker, was abducted by militants in Syria last year and appeared at the end of a video showing the beheading of US journalist Steven Sotloff earlier this month.

The Foreign Office was working urgently tonight to verify the contents of the video, in which the hostage says he holds David Cameron and Britain's foreign policy responsible for his own execution.

The Prime Minister said: 'The murder of David Haines is an act of pure evil. My heart goes out to his family who have shown extraordinary courage and fortitude.

'We will do everything in our power to hunt down these murderers and ensure they face justice, however long it takes.'