London, Mar 2 : Dungeon dad Josef Fritzl has claimed that he jailed his teenage daughter Elisabeth in a secret cellar because he caught her sniffing drugs.

The Austrian sex beast held his daughter Elisabeth captive in a dungeon beneath his home, raped her for 24 long years, and fathered seven children with her.

He says that keeping Elisabeth as a sex slave and having children were "normal family life".

According to the leaked 130-page report detailing his interviews with Austria's leading woman psychiatrist, the 74-year-old man confessed that he first took Elisabeth into the cellar at Amstetten when she was 18 after finding her "lying totally apathetic in bed".

"She had been sniffing cleaning fluids and I decided I should talk with her," the Daily Star quoted him as telling Dr Adelheid Kastner.

"She reacted to my accusations with a couldn't-care-less attitude. A dreadful anger developed in me and, out of this anger, I decided to lock her up.

"Because she showed no improvement in her attitude, I decided to keep her locked up," he added.

During one of the sessions, he revealed how he raped his daughter in front of the children he had forced her to bear.

But he added: "Naturally, I turned the light down. Later, when I had built more rooms, I sent our new generation into them."

He also claimed: "We celebrated many occasions together - Christmas, Easter and birthdays. And the little ones had a lot of books, and also pets - fish and a budgie. They didn't miss anything as I really tried to make their life in captivity as pleasant as possible." (ANI)