SEATTLE (AP) _ Heavy traffic during a Thanksgiving Day sale disrupted Amazon.com's Web site for about 15 minutes, the company said.

The page-load problems began at about 11 a.m. Thursday, while the online retailer was offering Microsoft Corp.'s Xbox 360 video game systems for $100 to the first 1,000 customers. An entry-level Xbox system normally retails for about $300.

``We saw dramatically more traffic than what we anticipated,'' Amazon spokesman Craig Berman said Friday.

The Xbox sold out in 29 seconds, Berman said. Amazon also sold out of discounted Mongoose mountain bikes, Barbie dolls and Amazon Prime memberships with $100 gift certificates in about 15 minutes.

Amazon.com Inc. shares fell 57 cents, or 1.3 percent, to $42.39 in afternoon trading on the Nasdaq Stock Market.