Kolkata/IBNS: The Bharatiya Janata Party (BJP), which is the primary opposition force in the state, has demanded the resignation of West Bengal Chief Minister Mamata Banerjee over the rape and murder of 31-year-old trainee doctor at Kolkata's state-run RG Kar Medical College and Hospital.

Leader of Opposition Suvendu Adhikari said, "We are not accusing TMC but demanding the resignation of Mamata Banerjee as the Chief Minister, Home Minister and Health Minister. We would have demanded the same if someone else was in charge of the departments."

Adhikari has also lashed out at Banerjee for celebrating the Kanyashree Day amid people's heartbreak over the rape and murder case.

"The government has no shame. When people are sad over the gruesome rape and murder case, Mamata Banerjee has ordered 3,000 packets of Chicken Biryani to celebrate Kanyashree Day at Dhono Dhanyo Auditorium," said the Bharatiya Janata Party (BJP) MLA.

The Kolkata Police on Wednesday handed over arrested civic volunteer Sanjoy Roy, who is accused of raping and murdering a trainee doctor at RG Kar Medical College and Hospital, to the Central Bureau of Investigation.

Sanjoy has been handed over to the central probe agency's custody a day after the Calcutta High Court ordered a CBI probe into the incident, which sent shockwaves and triggered huge anger across the country.

The CBI will probe into the case, which has brought the Mamata Banerjee government under the scanner, under court monitoring.

Sanjoy was taken into CBI custody after his medical tests were conducted at the state-run SSKM Hospital.

The 31-year-old medical student was allegedly raped and murdered at the seminar hall of RG Kar Medical College and Hospital, which is located in North Kolkata's Belgachia area, last week.

Though the civic volunteer has been arrested in connection with the case, protesting students, who went for ceasework across the state, suspect more people are involved in the case.