Police and military officials say a series of suicide car bombings by the Islamic State group targeting a military outpost in Anbar province have killed eight soldiers and injured six.

They say the Monday morning attack west of Anbar's provincial capital Ramadi involved three vehicles, including two fuel trucks. The outpost was home to a joint contingent of army soldiers, policemen and allied Sunni militiamen.

The officials spoke on condition of anonymity because they were not authorized to speak to the media.

Late on Sunday, the Iraqi military said in a televised statement that its warplanes have targeted Islamic State positions in northern and western Iraq in what it called "qualitative" strikes, including one that targeted a meeting by members of the extremist group in the town of Tel Afar.