Glenn Greenwald, the columnist who broke the Edward Snowden NSA-leak story, is leaving the U.K.'s Guardian newspaper for a news start-up reportedly backed by eBay founder Pierre Omidyar.

glenn greenwald"The decision to leave was not an easy one, but I was presented with a once-in-a-career dream journalistic opportunity that no journalist could possibly decline," Greenwald said in a statement, adding that because the news of his departure leaked before an announcement was prepared, details will be "unveiled shortly."

The 46-year-old Brazil-based reporter and lawyer previously wrote for and penned three books, with another on the Snowden affair in the works.

Jennifer Lindauer, spokeswoman for the Guardian, said the paper is disappointed with his exit but "can appreciate the attraction of the new role he has been offered."

Greenwald told BuzzFeed the new venture would be a general media outlet and news site, including politics, sports, entertainment and features.

Reuters reported that Omidyar, who earlier backed a news site in Hawaii, Honolulu Civil Beat, is a key backer of the Greenwald project.