Russia’s Ministry of Defence has posted what it called “irrefutable proof” of the US aiding so-called Islamic State – but one of the images was actually taken from a video game.

The ministry claimed the image showed an IS convoy leaving a Syrian town last week aided by US forces.

Instead, it came from the smartphone game AC-130 Gunship Simulator: Special Ops Squadron.

The ministry said an employee had mistakenly attached the photo.

The Conflict Intelligence Team fact-checking group said the other four provided were also errors, taken from a June 2016 video which showed the Iraqi Air Force attacking IS in Iraq.

The video game image seems to be taken from a promotional video on the game’s website and YouTube channel, closely cropped to omit the game controls and on-screen information.

In the corner of the image, however, a few letters of the developer’s disclaimer can still be seen: “Development footage. This is a work in progress. All content subject to change.”