Amazon.com's (AMZN) Web site appeared to down early Friday afternoon.

Several Dow Jones employees in various locations were unable to call up the site.

Attempts to contact Amazon weren't immediately successful.

Internet site The Fly On the Wall told its subscribers of the outage earlier Friday afternoon. Tech-focused blogs were also discussing the outage.

It wasn't clear how long the site had been down, or what caused the outage.

Shares of Amazon were down 2.8% at $82.12.