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ized to publicly discuss details of the negotiations, said the U.S. and Russia agreed that Syria had roughly 1,000 metric tons of chemical weapons agents and precursors, including blister agents, such as sulfur and mustard gas and nerve agents like sarin.
• These officials said the two sides did not agree on the number of chemical weapons sites in Syria.
• U.S. intelligence believes Syria has about 45 sites associated with chemicals weapons, half of which have "exploitable quantities" of material that could be used in munitions. The Russian estimate is considerably lower; the officials would not say by how much.
• U.S. intelligence agencies believe all the stocks remain in government control, the officials said.

• Noncompliance by the Assad government or any other party would be referred to the 15-nation Security Council by the Organization for the Prohibition of Chemical Weapons. That group oversees the Chemical Weapons Convention, which Syria this past week agreed to join. The U.N. received Syria's formal notification Saturday and it would be effect Oct. 14.
• The weapons group's director-general, Ahmet

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