Russian woman kills boyfriend in sex game, beheads him and cuts off his genitals

In a shocking case of murder, horrifying new details have emerged of how a 21-year-old Russian student killed her boyfriend during a sex game before dismembering his corpse.

Anastasia Onegina murdered her lover Dmitry Sinkevich, 24, a former policeman and conscript soldier, at her flat in Oryol before slicing him up using a kitchen knife.

According to reports Onegina beheaded him, cut off his genitals and cheeks, severed his limbs, removed several fingers and toes and then gutted him.

Apparently Onegina threw some pieces into the bins outside, while she stored others in the freezer, and yet more were hung on hooks around her apartment like a butcher's shop.

While she initially denied killing Sinkevich, telling police she had found him dead before dismembering the corpse , she later admitted causing his death.

Sinkevich died of asphyxiation during a BDSM sex game, investigators say.

Speaking to Mail Online, a neighbour Lyubov who saw inside her flat after the death and dismembering said that the boyfriend’s meat was hanging on hooks, but the police did not allow me to stop and look too closely.

Lyubov also said that his hands and feet were in the trash, guts were in a package in the refrigerator and fingers were scattered across the flat.

According to reports as Anastasia Onegina was cutting up his body, her sister Ksenia called her on her phone and asked what she was doing to which she admitted to dismembering her boyfriend. Ksenia called their father, who is a policeman, and he alerted authorities.

Onegina's husband previously died in suspicious circumstances shortly after their wedding. After his death, she was sentenced to a psychiatric hospital for a year and a half, but was then released.

A court has now ordered her to undergo psychiatric tests as the murder investigation continues.

Neighbours say the couple were fans of occultism and BDSM, and his social media included satanist images.

His final picture shows them together going for a walk with her dog at 7.50 am on Sunday. He died and was dismembered later the same day.

In the dead man's social media profile he had written: 'In love with Anastasia Onegina.'