Yingluck Shinawatra was forced from office a year ago after Thailand's Constitutional Court found her guilty of abuse of power.

The White House said the loss of Ramadi was "indeed a setback" and reassured Baghdad that it will help Iraqi forces take it back.

"More focus will be placed on promoting financial reforms to push forward the development of the real economy", the statement said.

The radicalization and recruitment of adults and children by Islamist terror groups is a mounting challenge for the authorities.