WASHINGTON -- A U.S.-led attack on Syria without United Nations support would be a war crime regardless of congressional approval, Noam Chomsky, the antiwar activist and author, said in response to President Barack Obama's announcement that he would seek Hill approval.

"As international support for Obama's decision to attack Syria has collapsed, along with the credibility of government claims, the administration has fallen back on a standard pretext for war crimes when all else fails: the credibility of the threats of the self-designated policeman of the world," Chomsky told HuffPost in an email.

Chomsky recently traveled to the region to learn more about the Syria crisis, and his comments there led some to believe he was open to military intervention if negotiations failed to produce peace. "I believe you should choose the negotiating track first, and should you fail, then moving to the second option" -- backing the rebels -- "becomes more acceptable," he said.

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