Amid allegations that Swami Nigamanand was poisoned, the CBI interrogated the staff of a hospital in connection with the death of the Sadhu who undertook a fast demanding an end to illegal quarrying in river Ganga.
A two-member team interrogated chief medical superintendent Ravindra Thapaliyal and administrative officer Santosh Kumari of the Haridwar district hospital on Saturday evening, official sources said.
The team also visited the ward where Nigamanand was admitted during treatment. It also collected the documents and prescriptions related to his treatment.
The CBI filed an FIR in the case against the then CMS of the hospital, Dr PK Bhatnagar, and the owner of the Himalaya Stone Crusher, Gyanesh Kumar, in connection with Nigamanand's death.
The post-mortem says Nigamanand died due to coma, septicaemia and degenerative brain disorder.
Nigamanand's guru Swami Shivanand dismissed the autopsy report alleging the administration was not allowing the truth to come out.
The 36-year-old Swami undertook an indefinite fast from February 19 demanding immediate stoppage of illegal quarrying in Ganga.
He was admitted to the Haridwar Hospital on April 18 and was later shifted to the Himalayan Hospital where he expired on June 13.