Updated

"X-Men Origins: Wolverine" isn't due in theaters until next month, but the prequel has already hacked its way online.

A high-quality, full-length work print of the 20th Century Fox film, which is set for release May 1, appeared online Tuesday. The film focuses on the beginnings of Hugh Jackman's clawed Marvel superhero Wolverine.

Fox said in a statement Wednesday the version of the film posted online was not complete and vowed that the source would be prosecuted. It said the FBI is investigating.