Indian police have charged six men with murder, hours after a woman who was gang raped on a bus in New Delhi died in hospital.
The men could face the death penalty if convicted, in a case that has triggered protests across India.
The 23-year-old victim was savagely beaten and raped for almost an hour before being thrown out of the moving vehicle.
She was flown to Mount Elizabeth Hospital in Singapore for specialist treatment, but later died from severe organ failure.
The victim's body has arrived back in India from Singapore Sky's India Correspondent Alex Rossi said: "The general thinking behind it as far as the prosecution service is concerned is that the way she was treated on that bus, the manner in which she was subjected to such a brutal attack, the fact that she was thrown from the bus whilst it was still moving and was unconscious suggests that they're fairly confident now that there was pre-meditation in the attack."
Her uncle has called for those responsible to be given the "strictest possible sentence".
"This is a very sad day, and a very very sad happening," he said. "My condolences are with my niece's family."
Indian police are braced for more protests Sonia Ghandi, the president of India's National Congress, has promised to fight for change.
She said: "(The death) strengthens our resolve to fight with all our might, and all the powers of our laws and our administration, for the safety and protection of all women of our country, and to ensure swift and fitting punishment for the perpetrators of such brutal acts."
More than 1,000 protesters have gathered in New Delhi city centre for a sit-in, demanding political change to protect women from violence.
Activists light candles in memory of the rape victim The area is home to the president's palace, the prime minister's office and key defence, foreign affairs and home ministries.
Authorities fear a repeat of demonstrations a week ago, where police fired tear gas and water cannon at activists after violence broke out.
But Daily Telegraph journalist Rahul Bedi, who is in New Delhi, said protesters were likely to remain peaceful to "avoid giving the politicians a tool" to criticise them.
Police have closed-off parts of New Delhi with metal barriers "I think there's a conscious decision on the part of the protesters in the land of Gandhi to protest in a non-violent way," he added.
"These sit-ins are going to continue for a long time. This crime has shocked the country, rape is something this country has been dancing around for the last 30 or 40 years."
A chartered aircraft has flown the victim's body back to India, along with members of her family.
Indian Prime Minister Manmohan Singh said he was deeply saddened by the woman's death and described the reaction to the case as "perfectly understandable from a young India and an India that genuinely desires change".
"It would be a true homage to her memory if we are able to channel these emotions and energies into a constructive course of action," he added.
A small demonstration is also taking place near the Indian High Commission in London.
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