Fresh evidence that US soldiers handed over detainees to a notorious Iraqi torture squad has emerged in army logs published by WikiLeaks.
The 400,000 field reports published by the whistleblowing website at the weekend contain an official account of deliberate threats by a military interrogator to turn his captive over to the Iraqi "Wolf Brigade".
The interrogator told the prisoner in explicit terms that: "He would be subject to all the pain and agony that the Wolf battalion is known to exact upon its detainees."
The evidence emerged as the deputy prime minister, Nick Clegg, said the allegations of killings, torture and abuse in Iraq were "extremely serious" and "needed to be looked at".
Clegg, speaking on BBC1's Andrew Marr Show, did not rule out an inquiry into the actions of British forces in Iraq, but said it was up to the US administration to answer for the actions of its forces. His comments contrasted with a statement from the Ministry of Defence today, which warned that the posting of classified US military logs on the WikiLeaks website could endanger the lives of British forces.