Central Bureau of Investigation (CBI) sleuths on Sunday launched search operations on the premises of former principal of R G Kar Medical College and Hospital Sandip Ghosh, its ex-Medical Superintendent Sanjay Vashisth and 13 others in and around Kolkata in connection with their investigation into alleged financial irregularities at the medical facility run by West Bengal government, officials said.

A postgraduate trainee doctor was raped and murdered in the hospital on August 9, sparking a national outcry. A Kolkata Police civic volunteer was arrested in connection with the incident.

The anti-corruption unit of CBI is also searching the residences and offices of those engaged in supplying materials for management and care of patients.

At least seven CBI officers are questioning Ghosh at his Beliaghata residence since 8 am, while others are grilling Vashisth, the former medical superintendent and vice principal of the hospital, and another professor of the forensic department of the medical establishment, among others, they said.

The probe into financial irregularities began a day after the CBI subjected Ghosh to polygraphy (lie-detection) test yesterday.

The CBI is also searching the residences and offices of those engaged in supplying materials for management and care of patients.

At least seven officers of the central probe agency have been questioning Ghosh at his Beliaghata residence while others are grilling Sanjay Vashisth, the former medical superintendent and vice principal of the hospital, and another professor of the forensic department of the medical establishment, among others, they said.

Accompanied by a huge team of central forces, the CBI team, which reached Ghosh’s residence around 6 am, was made to wait for nearly one-and-half hours before he opened the doors, the officials said.

Another team of CBI officers also conducted searches at the ex-principal’s office at the hospital and also went to the canteen in the academic building.

On the direction of the Calcutta High Court, the CBI registered cases into rape and killing as well as financial irregularities.