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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Islamic State video with threat to kill British hostage

Another beheading video, released by Islamist terrorists this evening, has threatened that the next hostage to die will be British.

This latest one shows the death of a second American journalist - Steven Sotloff - once again at the hands of a hooded, British-sounding man.

Mr Sotloff's death was threatened in the first video two weeks ago.

This report by ITV News international affairs editor, Rageh Omaar does not contain the most upsetting images from the latest video, but some of it is distressing:

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