The Indian authorities carried out the death sentence by hanging at dawn Friday, against four men convicted of involvement in a gang rape crime that killed a student inside a bus in New Delhi and caused shock in India and the world at the end of 2012, according to the director of the great prison in the Indian capital.

The director of the Tihar prison, Sandeep Goel, explained that the death sentence by hanging was imposed "half past five in the morning" against Mukesh Singh, Vinay Sharma, Pawan Gupta and Ashkai Thakur.

The group was convicted on February 1 of having committed a brutal crime against Jyoti Singh, a 23-year-old student.

The four took turns sexually assaulting the young woman with an iron bar on a bus as she wandered the streets of New Delhi at night, and then threw her onto the side of the road. She died two weeks later in a hospital as a result of serious internal wounds.

Angry demonstrations broke out in which tens of thousands of people participated in all parts of this south Asian country, which led to highlight the plight of Indian women due to rape incidents and the need to impose tougher penalties for similar crimes.