The governor of Basra province has accused British forces of destabilising security following the arrest of 12 people over attacks against UK troops.
The men, some of whom are police officers, are still being questioned.
Governor Mohammed al-Waili said the British should have co-ordinated with him and with Iraqi security forces.
But the BBC's Caroline Hawley said the police force was thought to have been infiltrated by militiamen involved in attacks on troops.
Seven British soldiers have been killed in a spate of attacks involving roadside bombs since May.
A military spokesman told the BBC co-ordination would have been very difficult because the local council had issued orders to all policemen not to have any dealings with UK forces.
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Mr Kennedy was applauded by delegates at the party's Scottish conference in Glenrothes, Fife, when he told them: "It's high time our troops began to come home, as simple as that."
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http://news.bbc.co.uk/1/hi/world/middle_east/4323050.stm