Germany might deploy troops in Iraq if conditions there change, Peter Struck, the German defence minister, indicated on Tuesday in a gesture that appears to provide backing for John Kerry, the US Democratic presidential challenger.

In an interview with the Financial Times, Mr Struck departed from his government’s resolve not to send troops to Iraq under any circumstances, saying: “At present I rule out the deployment of German troops in Iraq. In general, however, there is no one who can predict developments in Iraq in such a way that he could make a such a binding statement [about the future].”