The 23-year-old medical student, who was severely beaten, raped for almost an hour and thrown out of a moving bus in New Delhi, was airlifted to Singapore on Dec. 26 for specialist treatment.   

“The patient is currently struggling against the odds, and fighting for her life,” Mount Elizabeth Hospital Chief Executive Officer Kelvin Loh said in a statement.

“Our medical team’s investigations upon her arrival at the hospital yesterday showed that in addition to her prior cardiac arrest, she also had infection of her lungs and abdomen as well as significant brain injury.”

The victim had already undergone three abdominal operations before arriving in Singapore where her condition on Thursday was described as “extremely critical”.

Demonstrations over the lack of safety for women erupted across India after the Dec. 16 attack on the unnamed victim, culminating last weekend in pitched battles between police and protesters in the heart of the capital.

Should the woman die, it could trigger fresh outrage over the case, which caught Prime Minister Manmohan Singh’s government off-guard and triggered a blame game between politicians and the police.

“We share the anguish and anger with the country over this heinous crime,” Singh told reporters on Friday. “Our prayers are with the brave young girl and best possible medical care is being provided to her.”

New Delhi has the highest number of sex crimes among India’s major cities, with a rape reported on average every 18 hours, according to police figures. Government data show the number or reported rape cases in the country rose by nearly 17% between 2007 and 2011.