One of the convicts in the Nirbhaya gangrape-and-murder case has been shifted to Tihar jail, officials said on Tuesday.

The convict, Pawan Kumar Gupta, who was lodged in the Mandoli Jail, was shifted to Tihar recently, director-general (prison) Sandeep Goel said.

He has been lodged in jail no. 2, where two other convicts in the case — Mukesh Singh and Akshay — are also lodged. The last convict in the case, Vinay Sharma, is in jail no. 4, another jail official said.

The 23-year-old physiotherapy intern, whose name was changed to 'Nirbhaya' meaning fearless, was raped in a moving bus in south Delhi by six persons, including the bus driver, conductors and helpers, on December 16, 2012.

In a critical condition, she was transferred to the Mount Elizabeth Hospital in Singapore, where she succumbed to her injuries on December 29, 2012. She was earlier being treated in New Delhi.

All the accused in the case, including a juvenile, were arrested and charged with sexual assault and murder.

Ram Singh, one of the accused, died while in police custody. The rest went sent on trial in a fast-track court.

All the accused were convicted, including the juvenile, who was convicted of rape and murder and given the maximum sentence of three years' imprisonment in a reform facility.

The remaining four accused were found guilty of rape and murder and three days later, sentenced to death by hanging in September 2013.

On March 13, 2014, the Delhi High Court upheld the guilty verdict and the death sentences.