Russia's Defense Ministry, however, remained adamant that the USA was indeed "covering ISIS combat units to recover their combat capabilities, redeploy, and use them to promote the American interests in the Middle East" and shared new images it claimed were meant to be attached to the original post.
The Russian Defense Ministry on Tuesday accused the US -led coalition of interfering with the Russian air force to protect retreating Islamic State (IS) militants.
The nation's Ministry of Defense tweeted a series of what appears to be drone combat images in an attempt to claim that the United States working with ISIS in Syria.
The Russian Ministry of Defense has since deleted the posts.
The archived Facebook post claims that the Syrian Army, backed by the Russian Air Force, "liberated" the city of Abu Kamal last week.
At least one of the photographs exactly matched a frame from a promotional video for a "AC-130 Gunship Simulator" computer game posted online in March 2015.
The ministry said an employee had mistakenly attached the photo.
The ministry's crop of the image even contained parts of the disclaimer text in the top right-hand corner, presumably left by the developer, which read: "Development footage. All content subject to change". The statement wasn't even fully cropped out of the images that Russian Federation tweeted.
"The claim itself is actually ridiculous", Kofman said, with a laugh.
"Such actions by the coalition show that the rapid advance of the Syrian troops in Abu Kamal have disrupted USA plans to create pro-American authorities beyond the control of the Syrian government, and to manage the territories on the eastern bank of the Euphrates", it said.
The ministry is investigating its civil employee who attached a wrong photo to illustrate the ministry's statement on Abu Kamal.
Coalition spokesman Col. Ryan Dillon called those claims, "about as accurate as their air campaign".
"I certainly can't verify, but I've seen the report that one of the pictures came from a video game".