Vienna - Josef Fritzl, the Austrian accused of having raped and imprisoned his daughter, has said he also kept his mother locked up in his house, Austrian media reported Thursday.

According to members of his family, Fritzl, 73, frequently insulted his mother and locked her up in a room in his house, where she died in 1980. He also bricked up the room's window, News magazine reported.

Police discovered last spring that the suspect had kept his daughter Elisabeth Fritzl, 42, in a cellar at his home in Amstetten for 24 years, where he had seven children with her.

According to the report of the court-appointed psychiatrist, Fritzl says that his mother abused him as a child, the magazine said.

"She raised me by herself, I never received love from her; she beat and kicked me until I lay on the floor bleeding," News quoted Fritzl as telling the psychiatrist.

Although Fritzl described his own suffering as a child in detail, he was "absolutely unable to anticipate the emotions of others," the psychiatrist wrote.

He admitted most of the alleged crimes, but he denies his daughter's allegation that he started raping her already when she was 11, before he locked her up in 1984.

The prosecutor at the court in Sankt Poelten is expected to complete her indictment by the end of next week, prosecution spokesman Gerhard Sedlacek told Deutsche Presse-Agentur dpa Thursday.

In the trial that is expected for late this year or early 2009, Fritzl faces a maximum sentence of imprisonment for life.

Neither Elisabeth Fritzl nor her children are set to appear at the trial.

Three of the children lived upstairs in the suspect's home, three were kept in the cellar, and one died shortly after birth. (dpa)