BUFFALO, N.Y. – Facebook founder Mark Zuckerberg says emails and a signed document that form the basis of a New York man’s lawsuit claiming part ownership of the social networking phenomenon are fakes.

Zuckerberg’s statements were included in papers filed Thursday by his attorneys in federal court in Buffalo.

The attorneys want to examine Ceglia’s computers and electronic media.

Ceglia claims he and Zuckerberg signed a contract after Zuckerberg, then a Harvard University student, responded to his Craigslist help-wanted ad for work on a street-mapping database he was creating.

According to the lawsuit, Ceglia paid Zuckerberg $1,000 to work on the street-mapping project and gave him another $1,000 after Zuckerberg told him about his Facebook idea, with the condition Ceglia would get half if it took off.