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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Obama: Prayers with family of courageous Sotloff

President Obama said the "prayers of the American people are with the family of devoted and courageous journalist Steven Sotloff".

President Obama speaking at a press conference in Estonia.

The President said US intelligence had confirmed Mr Sotloff was killed in "an horrific act of violence" by Islamic State.

"We cannot even begin to imagine the agony of everyone who loves Steven is feeling right now," he said at a press conference in Estonia.

"Today our country grieves with them."

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