US plans to raise troop numbers in Iraq amid fresh strikes on IS

The Pentagon is moving to increase the number of American troops in Iraq in the wake of new strikes that killed the Islamic State's finance minister and other top leaders of the terror group.

But senior US defence officials say the deaths will not "break the back" of the extremist group, which is in a fierce fight for an ancient city in Syria and has said it carried out the bombing at a football stadium in Iraq on Friday.