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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John Kerry urges allies to join campaign against IS

John Kerry has urged America's "core coalition" including the UK to contribute to the campaign against Islamic State (IS).

John Kerry has urged America's allies to join the fight against IS militants. Credit: Reuters

But the US Secretary of State insisted there will be "no boots on the ground".

Mr Kerry called for a plan to counter the threat of IS in time for the UN General Assembly later this month.

David Cameron has repeatedly refused to rule out joining the US in carrying out air strikes on IS strongholds.

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