Inspectors overseeing efforts to destroy Syria 's chemical weapons have examined one more site in the war-torn country , leaving only one to go . The joint mission between the Organisation for the Prohibition of Chemical Weapons and the United Nations has verified 22 of the 23 sites disclosed by Damascus , the mission announced Thursday . Report : Syria peace conference wo n't happen before December . The latest site , in Aleppo , was one of two that could not be visited earlier for safety reasons , the mission said in a statement . `` As per the declaration by Syria , the site was confirmed as dismantled and long abandoned with the building showing extensive battle damage , '' the statement said . But while the inspection progresses , the United States is looking at new classified intelligence suggesting that Syria might not fully declare its chemical weapons stockpile , CNN has learned . The intelligence is not definitive , but `` there are various threads of information that would shake our confidence , '' one U.S. official said . `` They have done things recently that suggest Syria is not ready to get rid of all their chemical weapons . '' CNN has spoken to several U.S. officials with access to the latest intelligence on Syria , who confirmed the information . All declined to be identified because of the sensitivity of the data . U.S. intelligence agencies , the Defense Department , the State Department and White House are all reviewing the information .
Inspectors reached a site that could not be visited earlier for safety reasons . They ' ve now looked at 18 of 23 sites named by Syria . New Russian intelligence says Syria might not fully declare its stockpile .