Prime Minister David Cameron has said Britain could step up its involvement in Iraq.
Writing in the Sunday Telegraph he said: "True security will only be achieved if we use all our resources- aid, diplomacy, our military prowess- to help bring about a more stable world."
But one of his own MPs, who is in Iraq, has urged caution and said we need "much more information" before doing anything.
ITV News Political Correspondent Emily Morgan has this report:
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