An Indian woman who was gang-raped on a bus in New Delhi suffered "significant" brain damage and is fighting for her life.
The 23-year-old woman was flown to Singapore for treatment at Mount Elizabeth hospital on Thursday.
The unnamed victim had already undergone three abdominal operations and suffered a cardiac arrest in India prior to her flight.
Hospital chief executive Dr Kelvin Loh said she also has an infection of the lungs and abdomen and "is currently struggling against the odds".
"She continues to remain in an extremely critical condition and is still receiving treatment at the hospital's intensive care unit," he added.
The announcement comes 10 days after she was brutally attacked by six men on December 16.
The rape has triggered widespread outrage and riots across India.
Official figures show that 228,650 of the total 256,329 violent crimes recorded last year in India were against women.
The real figure is thought to be much higher as so many women are reluctant to report attacks to the police.
During an address to the chief ministers of India's states on Thursday, Prime Minister Manmohan Singh pledged to bring in new laws to cover attacks on women.
In a separate incident, a 17-year-old Indian girl who was gang-raped killed herself after police pressured her to drop the case and marry one of her attackers.
One police officer has been sacked and another suspended over their conduct after the assault during the festival of Diwali on November 13, according to officials.
The teenager was found dead on Wednesday night after swallowing poison.