UN envoy urges Security Council to demand halt to Sunni extremist group's hostilities in Iraq

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The top U.N. envoy in Iraq is urging the Security Council to demand that the Islamic State extremist group stop all hostilities and atrocities.

Nickolay Mladenov told the council by videoconference from Baghdad on Wednesday that it should also call on U.N. member states to bring to justice "the perpetrators, organizers and sponsors of these horrific terrorist acts, war crimes and crimes against humanity."

He said the Islamic State group has grown from a splinter group of al-Qaida to be "a complex threat to peace and security in Iraq, the entire region and beyond."

Mladenov said the Sunni extremist group now controls about one-third of Iraq including critical infrastructure, oilfields and pipelines and is well financed with some $450 million taken from the Iraqi Central Bank in Mosul.