Gamers who are keen to see more of Grand Theft Auto IV should log onto the Xbox LIVE Marketplace later today to watch a new trailer for the game.

Entitled "Looking For That Somone", the new footage, which can be watched by all on Xbox.com or in high-definition via Xbox LIVE, will become available at 6pm today and will also be accompanied by exclusive images from the forthcoming epic.

Grand Theft Auto IV will be released for Xbox 360 and PS3 October 19.