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Islamic State leader calls for jihad in audio message

The leader of the Islamic State, formerly Isis, has released the first audiotape calling for jihad since the group renamed. The group is currently battling Iraqi forces across large parts of the country.

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Battle for Iraq's oil continues as Obama considers action

Isis militants have joined up with Sunni tribesmen to maintain their offensive in Iraq.

The centre of their attention is the country's most important economic asset; oil.

As the Iraqi army clashes with insurgents for control of the major oil refinery at Baiji, President Obama has been discussing plans for US involvement in the crisis with congressional leaders.

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