The CBI's allegation is that Sister Abhaya saw Sister Sephy together with two male priests, who are co-accused in the case, in 'suspicious circumstances' and so the three killed her.

The CBI alleged that the accused nun was trying to prove herself to be a virgin, and the agency used objectionable language in its report to describe her.

'I was shocked and outraged reading the report and I am sure that anyone who read it would have the same reaction,' Karat said.

She added: 'The language used in the charge sheet against a female accused invites criminal action against the officials concerned under laws pertaining to protection of a woman's dignity, against harassment as also against obscenity.'

Karat said that in many cases relating to women, including rape victims, the language used by the investigative agencies was often highly offensive.