Austria ? A woman who went missing in 1984 was found by police over the weekend and told investigators that she had been held by her father in a cellar, where she was repeatedly raped and gave birth to at least six children, police said Sunday.

Authorities said that the father may have told acquaintances and relatives that his daughter had joined a cult and disappeared.

Franz Polzer, head of the Lower Austrian Bureau of Criminal Affairs, told reporters that the father, identified as Josef F., had been taken into custody. Police said Josef and his wife had been raising three of their daughter’s children. The other three grew up in the cellar.

“We are being confronted with an unfathomable crime,” Interior Minister Guenther Platter said.