A woman has confessed to castrating and killing her former son-in-law after stabbing him 27 times 'because he was late with alimony payments'.

After stabbing Dmitry Bogdanov, 32, and using a kitchen knife to slice off his testicles, she then threw them out of her open flat window in Nogorod, Russia, police said.

The 49-year-old woman and her partner, from Borovichi in the Novgorod region, were detained by Russian police.

Dmitry Bogdanov, 32, was killed by his former mother-in-law because he was allegedly late with child support payments

Bogdanov had shared a drink with his ex-mother-in-law and her partner when a row broke out.

The unnamed woman accused Bogdanov of failing to pay money and give help to his ex-wife and son.

She stabbed him several times with a knife and, when Bogdanov collapsed, her boyfriend grabbed the knife and continued the attack.

She used a kitchen knife to slice off his testicles and then threw them out of her open flat window in Nogorod, Russia

After the horrific killing, the mother phoned her daughter and told her what she had done

She then cut off the victim's testicles, before hurling them out of the window of her flat.

Police said the man had been stabbed 27 times.

After the horrific killing, the mother phoned her daughter and told her what she had done.

She stabbed him several times with a knife and, when Bogdanov collapsed, her boyfriend grabbed the knife and continued the attack

Stunned, the daughter immediately called the police.

The couple initially denied murdering Bogdanov but later confessed, said police.

The Russian Investigative Committee has opened a murder case.