"Russian officials have worked with the Syrian regime, we believe, to sanitize the locations of the suspected attacks and remove incriminating evidence of chemical weapons use", she added.
A United Nations security team came under fire in Syria on April 18 while doing reconnaissance for inspectors to visit the sites of the suspected attack.
France joined the United States and Britain in launching air strikes a week ago against the regime of Bashar al-Assad, in retaliation against the Douma attack which local medics said killed at least 40 people.
The United Nations' special envoy for Syria says he is encouraged that Russian Federation continues to support the so-called Geneva process for a political resolution in Syria despite tensions over the Western missile strike.
"We no longer have such moral obligations", Lavrov said.
General Kenneth McKenzie, director of the USA military's Joint Staff, said Syrian President Bashar al-Assad's regime retains a "residual" chemical capability at a variety of sites across the country.
Wilson's statement came during an OPCW Executive Council Meeting following joint airstrikes by the U.S., U.K., and France on reported Assad regime chemical weapons facilities in Syria.
Gunmen shot at the United Nations team in Douma yesterday and detonated an explosive, leading it to return to Damascus, said the head of the global chemical weapons watchdog, Ahmet Uzumcu.
"I'm 100 percent convinced that the military won't allow it", Lavrov said, adding that the Russian and US presidents also "bear responsibility before the people which elected them for peace and security". "The reconnaissance team returned to Damascus".
"The U.S. ambassador to the OPCW, Kenneth Ward, expressed Washington's concern that almost two weeks after the attack, inspectors would find tampering of evidence". It says the evacuations will continue for three days.
Russian Federation has revealed that it warned the U.S. about "red lines" it should not cross before it launched airstrikes on Syria.
Journalists were not allowed to approach the convoy that included the vehicle by Syrian security forces. It is not mandated to conclude which side in the conflict used them.
France, the United States and Britain have amended a draft resolution on Syria, seeking UN Security Council support for a political and humanitarian response to the conflict that has so far met resistance from Russian Federation.
"You can actually do what we call it in the military business as the decontamination process, which is to remove all the evidence on the ground by using other chemicals to neutralise the chemicals on the ground".