He said it was more surprising coming from Russian Federation.
He said the logic of strikes on alleged facilities with toxic agents in Syria was unclear, because if toxic agents had theoretically been stored there, tens of thousands of people would have died after the cruise missile strikes.
The Syrian war has been going on for more than seven years.
The Russian delegation to the OPCW will hold a briefing on Thursday in The Hague at which it will present "some Syrians to speak about the reported Douma incident", the agency's statement said.
Humam Husari describes it as a "desperate and cheap attempt by Russian TV to deny the obvious attack on Douma".
Chemical weapons inspectors collected on Wednesday more samples from the Syrian town of Douma, three weeks after a regime chemical attack in the area that left at least 40 people dead.
Husari says that in one segment, the reports use behind the scenes images from the set of his short film called "Chemical", as it was being filmed in the eastern Ghouta region in 2016. Damascus says no chemical attack took place in Douma.
"A group of OPCW experts, which arrived in Douma on April 21, continues its work".
United Nations humanitarian chief Mark Lowcock described the pledges as a "good start" and said he expected the amount to grow.
Lowcock told reporters during an worldwide donor conference in Brussels on Wednesday involving around 85 delegations that the figure was his "best guess" based on commitments made so far.
"That doesn't mean we should stop", he said.
Lowcock thanked the EU, Germany and Britain for making large offers.
Britain's ambassador to the Organisation for the Prohibition of Chemical Weapons (OPCW) said on Thursday that a briefing arranged by Russian Federation and Syria on the OPCW's premises was a stunt. An earlier visit took place Saturday after the inspectors were delayed for days from getting to the town, just east of Damascus, for security reasons.
The Syrian government and Moscow say the alleged chemical attack, which prompted a series of air strikes by Western allies as an act of retaliation, was staged. The U.S., France and Britain also blamed the Syrian government and launched joint punitive airstrikes targeting suspected Syrian chemical weapons facilities on April 14. Britain vehemently denied the Russian accusation.
On the combined US-UK-France airstrikes in Syria, the General stressed that intelligence data shows that Osa, Kvadrat, Buk, Strela-10, Pantsir and S-125 air defense systems destroyed 46 cruise missiles during the recent aggression.
Russian Federation and Syria intend to hold a news conference near the OPCW premises in the Hague later. Rudskoi did not specify the type of weapons, but his remarks follow reports in the Russian media that Moscow is considering selling its S-300 surface-to-air missile systems to Syria.
Top officials in Russian Federation said it might reconsider its pledge a decade ago not to provide Syria with the S-300 system.
Russian Federation is a key ally of Syrian President Bashar Assad.