(CNN) — Although the U.S. focus remains on exerting diplomatic and economic pressure on Syria, the Pentagon and the U.S. Central Command have begun a preliminary internal review of U.S. military capabilities, CNN has learned.

The options are being prepared in the event President Barack Obama were to call for them. Two senior administration officials who spoke about the review to CNN emphasized that U.S. policy for now remains the use of non-military options.

The focus on diplomatic options was underscored by the U.S. ambassador to the United Nations in an interview with CNN on Tuesday.

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