Iraq conflict: US air strike supports embattled Iraqi troops

The US has carried out its first air strike against Islamic State (IS) militants under a new strategy to defeat the group.

The US military said Monday's strike had destroyed an IS fighting position south-west of Baghdad that had been firing on Iraqi forces.

In northern Iraq, Kurdish "peshmerga" forces backed by US surveillance jets and drones have been advancing against IS positions, as the BBC's Jim Muir reports.