It said that the attacks took place on Sunday and Monday near Mount Sinjar and south-west of Baghdad.
They were the first made as part of expanded efforts outlined by US President Barack Obama last week.
Meanwhile Iraq has criticised the decision not to invite Iran to an international summit on the IS threat.
Foreign Minister Ibrahim al-Jaafari said the decision was "regrettable".
Thirty countries pledged to join a US-led coalition against IS in Paris.
The militant group, which originated in Syria, has swept through parts of western and northern Iraq in recent months and now controls large areas of both countries.
Photo
More about:
