Moscow vetoed a Western draft United Nations resolution Wednesday, saying it failed to mention the need to inspect the area of the attack.
Mr Assad added that the Syrian government gave up chemical weapons as part of a 2013 agreement, in the interview broadcast by AFP.
Assad claimed those images - which emerged from numerous sources inside Syria - were all "fake".
No communications that confirmed Russian involvement were intercepted, according to the official, however, he did say that it was likely due to the Russians being more careful in their communications, CNN reported.
He insisted several times that his forces had turned over all chemical weapons stockpiles in 2013, under a deal brokered by Russian Federation to avoid threatened United States military action.
Russian Federation has once again denounced what it called "an act of aggression", after the USA missile strike on a Syrian airbase in retaliation to a reported use of chemical weapons in Khan Sheikhoun. "It's no longer obsolete", he said, though he repeated previous calls by USA presidents for Nato's European members to increase their defence spending. He said that the intercept was part of a review of US intelligence following the assault to confirm responsibility for the use of chemical weapons.
Now what? When facing three opponents, as America is with Russia, Syria and Iran, the most obvious response is to try to break them up through a side deal with one of them.
'Misdirected' strike in Syria kills 18 allied fighters, USA military says
The jury is still out, but let's say , for the sake of argument, that Assad didn't launch chemical attacks against his own people. Assad avoided such retaliation only by capitulating to the demand that he destroy his large chemical weapon arsenal.
Russia's hopes for a thaw in Russia-U.S. ties following Trump's election have been shattered by the congressional investigation into alleged ties between Trump's campaign associates and Russian Federation.
USA ambassador Ward insisted it was a deliberate attack that amounted to "a direct affront to the Chemical Weapons Convention and, indeed, a direct affront to human decency, carried out by a State Party" to the OPCW, according to the text of his speech that was posted on the organization's website.
In an exclusive video interview with the Agence France-Presse (AFP) news agency, Mr Assad said "there was no order to make any attack".
It was the first direct United States military action against Assad's forces since the start of Syria's civil war six years ago and led to a quick downward spiral in ties between Washington and Moscow.
Russian foreign minister Sergey Lavrov agreed with his counterparts from Syria and Iran that the attack was a "flagrant violation" of worldwide law.
The foreign ministers from Russia, Syria and Iran, meeting Friday in Moscow, said any further unilateral action by the U.S.in Syria would be met with "grave consequences" and pose a danger to the entire world.
Tillerson said Syria's government had committed more than 50 attacks using chlorine or other chemical weapons over the duration of the conflict. "If the USA strike has no justification, it is blatant aggression against Syria's sovereignty", Muallem told reporters in Moscow.
Comments