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Memorial service held for IS victim Steven Sotloff

Nearly 1,000 mourners including relatives, friends and politicians, have attended a memorial service in Florida for US journalist Steven Sotloff, who was killed by IS militants.

The Islamic State released a video on Tuesday showing the murder of Mr Sotloff.

He is the second American journalist to be beheaded in two weeks over the group's confrontation with the US over air strikes in Iraq and its foreign policy.

Footage of James Foley being beheaded on August 19 shocked the world.

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Britain won't be 'cowed' by terrorists, Cameron vows

Following the death of Steven Sotloff and warnings that a British man could follow, David Cameron has vowed that the Government will not be "cowed" by terrorists.

As ITV News Political Correspondent Carl Dinnen reports, the Foreign Office remains insistent that the latest threats will not change Britain's policy in the region.

Warning: This report does not contain the most distressing images from the IS video, but some may still find its content disturbing

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