UPDATE: Sony has claimed that its reference to GTA 5 on PS4 was a mistake and apologised for the "typo".
In a tweet posted on its official Twitter account following this evening's blunder, Sony UK said: "Apologies for the typo about GTA V. It's due for release on PS3 on September 17th."
But if Sony's tweet really was a typo, why did it also retweet somebody else's tweet referencing GTA 5 on PS4...?
ORIGINAL STORY: When it comes to leaking details on GTA 5, it hasn't been a particularly good week for Sony - and the platform holder may have just let slip on an unannounced PlayStation 4 version of Rockstar's upcoming crime game.
Replying to a fan from the platform holder's UK Twitter account this evening, Sony UK said that "GTA V is going to be amazing, especially on the PS4!"
The account also retweeted a tweet from the same fan, which said: "GTA5 ON A #PS4 now that we be gaming at the best - while i am singing I "GET LUCKY" THE DAFT PUNK IN ME IS THINKING."
Though Rockstar has yet to announce a next-gen version of GTA 5, a PS4 and Xbox One version has often been rumoured.
Earlier this month, Rockstar's Leslie Benzies suggested that a next-gen version hadn't been ruled out, saying that the team will "get the current gen version out first and see what happens in the future".
GTA 5 launches on PlayStation 3 and Xbox 360 on September 17. A new trailer is set to be released this Thursday.
Source: @SonyUK (via NeoGAF)