OPCW refused to provide comment to The Daily Caller News Foundation on operational matters in order to ensure the safety of inspection team.
Asked when the United Nations security team would make another visit, he said, "as soon as practicable". The U.N. source did not give details of the shooting incident.
"At present, we do not know when the FFM team can be deployed to Douma", the OPCW chief said.
" 'It is our understanding the Russians may have visited the attack site, ' Ward said during a meeting Monday at The Hague".
Its inspectors have a mandate to determine the circumstances of the alleged chemical attack, but not to say who is responsible.
Also by playing a row around Russian diplomatic property in the U.S.as well as USA pressure on the RT broadcaster's activities in the U.S.
The "mission has not been accomplished", said Suzanne Akhras, president of the Syrian Community Network.
The team from the Organization for the Prohibition of Chemical Weapons arrived 10 days after the alleged attack, raising concerns that any evidence the inspectors find could be useless.
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Assad continues to deny using chemical weapons, telling visiting Russian politicians that Western air strikes against his country were accompanied by a campaign of "lies" and misinformation at the UN. The Army of Islam surrendered Douma two days later. "They were not injured and returned to Damascus".
"Investigating culpability for chemical weapons use is not a question of ability, but rather of authorization.The OPCW Fact-Finding Mission is tasked only with investigating if an alleged chemical weapons attack took place and if so, what kind of chemical weapon was used", said Alicia Sanders-Zakre, policy and programs research assistant at the Arms Control Association.
Worldwide inspectors have entered the Syrian town where an alleged chemical attack was carried out earlier this month, following delays by Syrian and Russian authorities.
Syria's UN Ambassador Bashar Jaafari told the Security Council on Tuesday that the OPCW experts would begin their investigation once they received the all-clear from the UN security team.
There were unconfirmed reports on Wednesday that cargo ships had docked at the Russian naval base of Tartus on the Syrian coast under the cover of smoke and aerosol gas to block satellite and drone sensors. Moscow, meanwhile, has said that the devastation in Douma was faked by foreign intelligence agencies looking for a rationale to attack Syria.
So far, Russia's repeated use of its veto has effectively protected Assad from serious intervention with a United Nations mandate.
It says the total number of evacuees has reached 5,000, including 1,500 gunmen.
He also suggested that the footage appearing to show people being treated in a hospital in the aftermath of the attack was staged. The suspected chemical attack triggered the USA response.