Washington also warned that Syrian President Bashar Assad and the Syrian military "will pay a heavy price" if such an attack is carried out.
Commenting on the statement, Kremlin spokesperson Dmitry Peskov called it baseless.
"We heard about this statement. We do not know what the basis is. And of course we categorically disagree with the 'another attack' wording," Peskov told journalists.
"Apparently, they just can’t let it go. They just can’t stop looking for a pretext to stop the growing influence of the Syrian Army. Evidently, there is no other way but imputing [such plans] to Damascus. This is what behind their bogus stories," Zinin said in an interview with Radio Sputnik.
The expert suggested that Washington hopes to "impose its own scenario" on Damascus before Daesh is completely defeated.
"Moreover, Iraqi forces are advancing against terrorists and nearing the border with Syria. This is a major achievement. As soon as both countries restore control over the border a decisive blow will be delivered to Daesh, including to its capability to maneuver and move forces between the two countries," Zinin concluded.
In response to the incident, Washington, which had not presented any proof of the chemical weapons use by Damascus, launched 59 Tomahawk cruise missiles at a Syrian governmental military airfield in Ash Sha’irat on April 6.
Damascus has repeatedly denied any involvement in the incident and said that the Syrian government doesn't possess chemical weapons as the full destruction of Damascus’ chemical weapons stockpile had been confirmed by the OPCW in January 2016.