The 23-year-old law student was at her residence in the state capital Thiruvananthapuram late Friday when she says she was attacked by the 54-year-old man, who had claimed to her family to be a religious guru.
Indian lawmaker arrested for raping minor girl
"She used a knife in her defence and cut off his penis," district police chief G Sparjan Kumar said.
"The man, Hari Swami, was rushed to the nearby government hospital in a serious state," he added.
The local media reported that Swami was in a stable condition after undergoing emergency medical procedures at the local hospital.
The woman claimed the man had been assaulting her for several years, according to Kumar, who said police had registered a case against Swami for sexual offences against a minor and rape.
Police said the girl's parents, who live at the same house, were unaware of the assaults by Swami.
"The woman told us that her parents blindly trusted this Swami, and he used to get frequent invites to perform special ceremonies and stay over at their house, where he assaulted her," Kumar said.
Indian police arrest four men on charges of raping American tourist
She is now under police protection and receiving trauma counselling.
There have been other recent incidents of sexual assault involving religious men in the southern Indian state.
Two nuns and a priest, accused of covering up the birth of a baby born to a teenage girl who was allegedly raped by another priest, were arrested in Kerala last month.
Last year, a priest was sentenced to 40 years in prison by a Kerala court for raping a 12-year-old girl in 2014.
Hari Swami, aka Gangeshananda Theerthapada, claims to be a spiritual healer and is a former inmate of the Panmana Ashram in Kollam district.
COMMENTS (17)
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ