Nintendo of America has broken its own sales records in the first week of this holiday shopping season, and analysts fear there may not be enough supply to meet the demand.

The firms DS portable game-player set a new company sales record for Thanksgiving week, eclipsing the previous mark of 600,000 Game Boy Advance systems sold during the same period in the United States in 2005. Nintendo DS remains on track to be the top-selling video game system of 2007, it said.

Its latest home-system, the Wii, sold 350,000 just shy of the record set last year when the system debuted. The firm has said that it increased production, however, some industry analysts still speculate if the game-maker can keep up with fans.