The mother of the junior doctor who was raped and murdered at the RG Kar Medical College and Hospital said on Friday the police had kept the family "under pressure" and harassed them on August 9, the day her daughter's body was found.

In an interview to news channel ABP Ananda, the woman also said she told chief minister Mamata Banerjee that Sanjay Roy, the civic volunteer who has been arrested for the rape and murder, was not the main accused and someone else was involved in the crime.

"We faced so much harassment till the body was brought. They kept us under pressure. The police also tried to damage my daughter's car. I said my daughter has just passed away, please do not damage her car," the woman said.

"The chief minister told me the main accused has been arrested. I told her I don't consider the person to be the main accused. If someone from inside was not involved, how could he (Roy) get to know that my daughter was alone?" the woman said.

"Someone from inside was definitely involved. The chief minister looked at the police officer (who was accompanying her) and said 'this is my question too','' the woman said.

The chief minister visited the family on Monday.

The victim's mother also alleged that the police tried to divert the case and told them that their daughter was sick after showing them medicines and prescriptions while the seizure list was being prepared.

"I was present when the seizure list was being prepared. The police took out some reports from my daughter's bag. They were trying to divert the case. They told me 'your daughter was sick, she used to have so many medicines. There are so many reports'," the woman said.

"I told them that my daughter was having the medicines because of an unknown bite mark, after which they could not divert the matter," she said.

In response to a question from the news channel, she said they got the first call from the hospital on August 9 at 10.53am. She said they reached the hospital at 12.30pm and were allowed to see their daughter's body at 3pm. They were made to sit in the chest medicine department for the entire period, she said.