After hours of fighting, the Unnao rape victim who was set ablaze and airlifted to Safdarjung Hospital in New Delhi on Thursday has died.

"She suffered a cardiac arrest at 11:10 pm and we tried to resuscitate her, but she could not survive and at 11:40 pm, she died," the Safdarjung Hospital spokesperson confirmed.

The 23-year-old woman was admitted to a Lucknow hospital on Thursday with 90 per cent burns and was later airlifted to Delhi for further treatment.

The woman was set ablaze by five men, including the two who were accused of raping her in December. She was attacked outside the Sindupur village in Unnao district when she was on her way to a court in Rae Bareli to attend a hearing in rape case.