A GANG of teens who raped a 14-year-old girl and left her for dead have walked free from court -- despite graphic video evidence of their assault.

Prosecutors are set to challenge the soft suspended sentences handed down last week following a closed trial in Hamburg, Germany.

6 Shame ... One of the teen attackers hides his face during sentencing Credit: CEN / NDR

6 Gang rapists ... Closed trial ended in attackers being allowed to walk free from court Credit: EuroPics [CEN]

6 Left for dead ... Group of attackers threw girl, 14, out onto the street after getting her drunk and brutally raping her Credit: CEN / NDR

There has been public uproar after only one of the group was given jail time.

Three teens were let off with only probationary sentences, while a 15-year-old girl who filmed and instructed the attack did not face charges.

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She had invited the young victim to a flat in the city last February, where she and her male friends plied the girl with so much alcohol that she began falling in and out of consciousness.

It was then that the three teen attackers -- aged between 15 and 17 -- decided with a 21-year-old to rape the girl.

Horrific details of the attackers' use of bottles and a torch to sexually assault the girl emerged during the trial, and a sickening video showing the attack was shown in court.

After raping the girl they then threw her semi-conscious and naked out into a freezing courtyard.

She nearly died of hypothermia before being discovered by a passer-by.

6 Walking free ... Three teen attackers were given only suspended sentences while adult accomplice as handed only a four-year jail sentence Credit: EuroPics [CEN]

6 Judge described the assault as disgusting but said girl's attackers 'showed remorse' Credit: CEN / NDR

On Thursday the gang was convicted of rape, with the court saying they treated the girl "like an object".

But only the adult, named as Bosko D, was handed a four-year jail sentence.

Zivora S, 17, Alexander K, 16, and Dennis Masser, 15, were given probation under juvenile law.

The judge said that despite the "terrible and repulsive" attack, the gang had shown "real shame and remorse" during the trial.

6 Light sentences have led to uproar in Germany Credit: EuroPics [CEN]

A petition calling for the gang-rapists to face harsher sentences gathered over 20,000 signatures Monday before prosecutors vowed to challenge the court ruling.

"The sexual self-determination and integrity of a woman must have more weight than any concern for the perpetrators", the petition said.

Germany has strict laws around the sentencing of children, making it difficult for prosecutors to secure jail time for minors.

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