LONDON: Katie Holmes’ friends are worried about her health as she and husband Tom Cruise are getting death threats from groups opposed to their Scientology religion. The FBI is said to be taking the matter very seriously.

Cruise is also said to have been threatened by people angered by his portrayal of Colonel Claus von Stauffenberg in the film Valkyrie.

Anti-Scientology group Anonymous hurled insults at him when the film premiered in Los Angeles last week. “Tom takes the security of his family very seriously,” the Mirror quoted a source as saying.

Four months ago, Cruise was warned that anthrax would be placed in his LA office. Ever since, he is said to have spent £5 million on an underground bunker at his Colorado estate. He and Katie also use bomb-proof vehicles.