Amazon has delivered pre-ordered copies of Grand Theft Auto V to several customers over the weekend despite the game's official release date being September 17.
A wave of happy consumers posted images up on Instagram and Twitter of their early copies of the game.
In a statement issued to GamesIndustry International
, Rockstar said it is in the process of investigating early sales to establish why the copies are being shipped early.
There are reports in Europe that Grand Theft Auto V is already readily available across Spain and at least one French retailer has apparently advertised that it is selling the game early.
Grand Theft Auto V is one of 2013s most anticipated games and has cost around $137m according to industry analysts. The title was announced back in November 2011 with development apparently starting around 2008.
Set in Los Santos San Andreas, a stand-in for Los Angeles Southern California, the game world is large enough to fit the maps of Grand Theft Auto: San Andreas, Grand Theft Auto IV's and Red Dead Redemption inside it according to art director Aaron Garbut.
Last month, Rockstar revealed GTA Online
, a dynamic and persistent online world that forms the multiplayer portion of the title. Allowing 16 players to connect to the same world, it will allow players to explore the city, work co-operatively on missions and sample the various mini-games in the game's world.