Rice said the United States would continue to support Turkey in containing rebels of the outlawed Kurdish Workers' Party (PKK), which both nations consider a terrorist organization.
But she encouraged Turkey not to take any unilateral action, and to cooperate with Iraq and the U.S.-led coalition in Iraq in implementing security measures.
Turkey is reported to be building up its forces in the areas near Iraq to intensify operations against Kurdish fighters based across the border.
(dpa, AP, AFP)