Oksana Makar, 18, was raped by three men in their early 20s, strangled with a cord, burned and left for dead in an attack in the southern Ukrainian city of Mykolayiv, investigators have said.
The victim was found by a passer-by after she was dumped by her attackers at an abandoned construction site. She was hospitalised in a critical condition with burns over 55 percent of her body, requiring the amputation of one of her arms.
She died of her injuries in a specialist hospital in the eastern city of Donetsk where she had been taken after her rescue, the clinic announced.
Her heart stopped beating after she suffered a pulmonary haemorrhage and she died despite three attempts to resuscitate her, the chief doctor of the Donetsk Burns centre, Emil Fistal, told AFP.
He said the fact she was able to survive for three weeks since the attack, which occurred on March 9 or 10 according to various sources, had only been possible due to intense treatment and therapy.
"Imagine. She was strangled and they (the attackers) thought she had died. So they burned her. She was lying there 10 hours in the freezing cold and inhaled the by-products of the burning," Fistal said.
President Viktor Yanukovych sent condolences to her relatives while Prime Minister Mykola Azarov vowed that the attackers would be punished "without compromise."
"Millions of Ukrainians believed that Oksana would survive and prayed for her, offering blood, buying medicine," Azarov said.
The case has caused a public outcry in Ukraine, exposing incompetence by the law-enforcement authorities and the extent of social problems in industrial cities like Mykolayiv which are riddled with drugs and AIDS.
Ukrainian media had alleged that the suspected attackers -- two of whom were initially allowed to go free -- are the sons of parents with strong connections to leading local officials.
The mother of one suspect used to be the head of a district in the Mykolayiv region, the regional interior ministry confirmed, prompting allegations the authorities had been trying to keep a lid on the whole affair.
Meanwhile, Makar's mother controversially posted a harrowing video of Oksana in hospital on YouTube where she raises up the bloodied stump of her arm and, apparently barely able to speak, says she feels "awful".
In another disturbing video that was leaked to Ukrainian media, one of the suspects is allegedly shown calmly relating to investigators how the three successively raped Oksana and then killed her when she started threatening to call police.
"She was wailing, waving her hands and I raped her. She did not calm down and I decided to strangle her," said the suspect in the video, adding that he first used his bare hands and then a cord when this did not work.
After changing their clothes, he said the three went to a kebab kiosk nearby.
"We sat, we smoked, and then we parted," said the suspect, whose face was blocked out in the video.
The three suspects were all arrested soon after the body was discovered but two were then released, prompting thousands to rally in protest in Mykolayiv and other smaller demonstrations across the country.
All three men were again placed under arrest on March 13. Ukrainian interior ministry spokesman Volodymyr Polishchuk told the Interfax-Ukraine news agency that all three had now been charged with premeditated rape and murder.
According to the interior ministry, several officials from the police and local prosecutors were fired and reprimanded for initially letting the suspects go free.
If convicted, the three face between 15 years to life in jail, although the brutality of the crime has renewed public debate about the use of the death penalty which was abolished in Ukraine over a decade ago.