The AP reports:

WASHINGTON (AP) - The Obama administration said Tuesday that Russia is sending attack helicopters to Syrian President Bashar Assad's regime and warned that the Arab country's 15-month conflict could become even deadlier.

Secretary of State Hillary Rodham Clinton said the U.S. was "concerned about the latest information we have that there are attack helicopters on the way from Russia to Syria."

She said the shipment "will escalate the conflict quite dramatically."

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