The statement called for aid workers to be respected in conflict zones and "stressed again that ISIL must be defeated and that the intolerance, violence and hatred it espouses must be stamped out."


Using an alternate acronym for the group, the council members emphasised that "such continued acts of barbarism perpetrated by ISIL do not intimidate them but rather stiffen their resolve that there has to be a common effort" against it and other jihadist groups.


The council also called for the ‘immediate, safe and unconditional release of all those who are kept hostage’ by IS and other groups associated with Al-Qaeda.


It urged all states "to cooperate actively" with Britain's efforts to bring the perpetrators of Haines' execution to justice.


Haines was kidnapped in Syria in March 2013.


His beheading was revealed in a video released late on Sunday by militants from IS, an extremist group that has taken over a vast territory in Iraq and Syria in recent months.

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