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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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US in mourning and confusion after Sotloff murder

The United States is in mourning for a second US journalist murdered by Islamic State militants, and questions remain over what the country's response should be.

US Vice President Joe Biden used the strongest language of its country's leadership yet, saying the country would chase the militants "to the gates of hell".

Nonetheless, as Washington Correspondent Robert Moore reports, the country's planned response to IS remains unclear:

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