(Photo: CGTN)

India's Supreme Court upheld death sentences for three men over the infamous gang-rape and murder of a woman in New Delhi in 2012 on Monday. 

"The review petition of all the three convicts has been rejected," A. P. Singh, a lawyer for the defendants said. 

Only three of the four men were involved in the appeal rejected on Monday. A fifth man, the suspected ringleader, was found dead in jail in a suspected suicide, while a 17-year-old was sentenced to three years in a detention center and has since been released.

The six members of a gang raped and tortured the 23-year-old woman Jyoti Singh with an iron bar as the bus drove loops through New Delhi in 2012. The brutal crime triggered national protests and soul-searching in India.