Kolkata/Ranaghat:The West Bengal government on Wednesday decided to hand over the case of gangrape of a 71-year-old nun of a Ranaghat convent school to the CBI as the demand for justice grew louder with the culprits still at large even after four days of the incident.

"Considering the seriousness and sensitivity of the case and also the fact that the place of incidence is very close to border area, I have decided to entrust the investigation of the case to the CBI," Chief Minister Mamata Banerjee said in a Facebook post. She said her government would provide all necessary cooperation and assistance to the CBI for investigation in this case.