The three pictures, posted on the Apple discussion Web site MacRumors.com, show a young Asian woman working on what appears to be an assembly line for iPhones.
Dressed in a pink striped outfit and hat and wearing white gloves with yellow fingertips, the young woman now known on the Web as the "iPhone Girl" is shown smiling and making victory signs as she poses next to an iPhone.
The MacRumors.com user who posted the photos last week, identified as only "markm49uk" from Kingston-upon-Hull, England, said in a posting that one of the pictures showed up on a new 3G iPhone when the iTunes program was launched.
News reports say the woman may work at a factory run by an Apple contractor, Taiwan-based Foxconn Technology Group, in the southern Chinese boomtown of Shenzhen.
Calls to Foxconn spokesman Edmund Ding went unanswered Wednesday. Ding also didn't immediately respond to an e-mail from The Associated Press seeking comment.
But the South China Morning Post on Wednesday quoted another Foxconn spokesman, Liu Kun, as confirming that the young woman in the pictures works for Foxconn.
Liu said workers testing the device took the pictures and may have forgotten to delete them, the Post reported.
Dubbing the mystery worker "China's prettiest factory girl," China's Southern Metropolitan Daily on Tuesday quoted an unidentified Foxconn official as saying the woman was not fired.
Apple publicist Jill Tan said the company had no comment.