A woman who beheaded her boyfriend then hacked off his genitals in a 'Satanic ritual' after he died in a BDSM sex session has been jailed for manslaughter in Russia.

Anastasia Beloshapkina cut up the body of Dmitry Sinkevich, severing his head and genitals, amid suspicions of a gruesome Satanic ritualistic sacrifice.

The 21-year-old also cut off his lips with a kitchen knife, severed his cheeks, butchered his limbs, fingers and toes, and gouged out his insides.

He died from asphyxiation in a 'rough sex session' in the flat the couple shared in the Russian city of Oryol, local media reports.

A judge at Severny District Court in the city jailed her for ten years after she was convicted of manslaughter and 'abusing the body of the deceased' in a closed-door trial.

Victim Dmitry Sinkevich with his girlfriend Anastasia Beloshapkina, who was found guilty of manslaughter after he died during a 'rough' BDSM sex session

Beloshapkina was found to have kept some of her partner's body parts in the bottom of her freezer draw at their home in the Russian city of Oryol

Using a kitchen knife, the corpse of the 24-year-old barman was cut up soon after the couple had sex to resemble images of the Satanic idol Baphomet.

She threw some body parts in rubbish bins outside the flat, others she put in her freezer, with the remaining pieces hanging on hooks around the flat like a butcher's shop.

As Beloshapkina cut up his body, her sister Ksenia called her phone and asked what she was doing.

She replied, 'I'm dismembering my boyfriend', and Ksenia called their parents who alerted police.

Neighbours say the couple 'made a lot of noise', were fans of occultism and BDSM, and his social media included satanist images.

One neighbour told Russia media: 'They held weekly orgies, and [neighbours] complained about them. They were said to be into sadomasochism and similar practises.'

The former policeman and conscript soldier's final social media picture shows the couple together going for a walk with her dog at 7.50am the morning he died and was dismembered.

Anastasia Beloshapkina (left) was convicted of the manslaughter of her boyfriend Dmitry Sinkevich (right in his conscript soldier uniform) in what was feared to be a Satanic ritual

Dmitry Sinkevich's body was cut up with some parts kept in a freezer, others were dumped in bins and the rest was hung up around the apartment he shared with his girlfriend Beloshapkina

Beloshapkina - the daughter of a police officer - confessed to manslaughter and cutting up her lover's body.

The defendant, who is also known by the family names Onegina and Savosto, was declared mentally fit to stand trial.

Dmitry's stepmother Nina said: 'They found everything except his liver. In the fridge were the head, hands, and feet.

'She had drained his blood. I only recognised him by his curls.'

A neighbour called Lyubov who saw inside her flat after the killing and dismembering said: 'I managed to see how it was. His meat was hanging on hooks, but they did not allow me to stop and look too closely.

'His hands and feet in the trash, guts in a package in the refrigerator, fingers are scattered across the flat.'

At Severny District Court of Oryol, Beloshapkina was jailed for ten years after being convicted of manslaughter and 'abusing the body of the deceased'

Larisa Timoshina, the victim's aunt, said: 'For us relatives, any punishment would be too mild. I feel sorry that there is a ban on the death penalty.'

The date he died overnight between February 10 and 11 had Satanic connotations, the court heard.

Nina Sinkevich added that an independent forensic investigator had established that the cutting up of the body 'was 99 per cent ritual murder'.

She said: 'When saw his head... we noticed that his jaws were tight, that means he was in strong pain.

'Why his fingers were cut off? There is a Satanic "god" Baphomet, who is like this.'

Describing the defendant, she added: 'My opinion is that she had a sense of accomplishment. She listened to her sentence in silence with such an inscrutable face. As if she was saying: "Yes, yes, I did it and I will answer for it".'