Five men have pleaded not guilty after being formally indicted on 13 charges, including rape and murder, in the fatal gang rape of a woman on a bus in New Delhi.
The men signed statements in the fast-track court saying they were innocent, said one of their lawyers. The lawyer cannot be identified under a gag order imposed by the court.
The court will begin hearing the evidence of witnesses on Tuesday.
A sixth suspect, who is 17, will be tried in a juvenile court. He could face a maximum sentence of three years in a reform facility if he is convicted as a juvenile. A conviction as an adult could have led to his execution.
Police said the victim and a male friend were attacked after boarding a bus on December 16 as they tried to return home after watching a film.