WASHINGTON - President Barack Obama said on Thursday he has asked officials to prepare a range of US military options for confronting Islamic State militants in Syria but said his strategy is still being developed.

At a news conference, Obama cautioned against speculation that he was on the brink of a decision to expand air strikes against Islamic State beyond targets already being hit in Iraq by US aerial attacks.

"I don't want to put the cart before the horse. We don't have a strategy yet. I think what I've seen in some of the news reports suggests that folks are getting a little further ahead of where we're at than we currently are."

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