ABC Australia reports: Sunni politicians in Iraq have accused pro-Government Shiite militias of torturing local Sunni men as they close in on Islamic State (IS) fighters in Fallujah.

The allegations have been denied, but the row highlights the deep sectarian divide that threatens to undermine the fight against IS, even as Government troops make important headway against the extremists.

The latest claims emerged after an unverified mobile phone video was broadcast by a Sunni-run TV station, known for attacking the Shiite-dominated Government in Baghdad.

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