A woman whose gang rape sparked protests and a national debate about violence against women in India died of her injuries on Saturday, prompting a security lockdown in New Delhi and an acknowledgement from India's prime minister that social change is needed. Bracing for a new wave of protests, Indian authorities deployed thousands of policemen, closed 10 metro stations and banned vehicles from some main roads in the heart of New Delhi, where demonstrators have converged since the attack to demand improved women's rights. Hundreds of people staged peaceful protests at two locations on Saturday morning. The 23-year-old medical student, severely beaten, raped and thrown out of a moving bus in New Delhi two weeks ago, had been flown to Singapore in a critical condition by the Indian government on Thursday for specialist treatment, as Ruters recorded. The intense media coverage of the attack and the use of social media to galvanize the protests, mostly by young middle-class students, has forced political leaders to confront some uncomfortable truths about the treatment of women in the world's largest democracy. Most sex crimes in India go unreported, many offenders go unpunished, and the wheels of justice turn slowly, according to social activists who say that successive governments have done too little to ensure the safety of women.