Thirty countries have pledged to help Iraq in the fight against the Islamic State of Iraq and the Levant (ISIL) "by any means necessary", as leaders gathered to discuss a strategy against the group.

French President Francois Hollande called for a global response to counter ISIL, as he opened a conference on Iraq, bringing together members of a US-led coalition.

Al Jazeera's Nadim Baba reports from Paris.

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