VIDEO: 'World War Z' Behind the Scenes Video Shows Zombies Run Amok

Hajdu Janos and Zsolt Bodnar, the director and deputy director of Hungary's Anti-Terrorism Unit stated, "This morning a private plane brought guns wrapped in a parcel from a company to an individual [in Budapest]. Guns like these are highly illegal to transport even if they were used as stage guns, which hopefully they weren't."

The authorities say they are interrogating witnesses now.

The film, directed by Oscar nominee Marc Forster, has been shooting in Hungary after filming in Glasgow during August and September.

Pitt stars as a UN Employee traveling the world to try and stop a zombie plague from decimating humanity. The film is due out from Paramount Pictures in 2012.