Killer nanny 'decapitated child as revenge for bombings in Syria'

A Russian nanny accused of decapitating a child and parading the severed head through the street claims the attack was revenge for President Vladimir Putin's bombing campaign in Syria.

Suspect Gyulchekhra Bobokulova from Muslim-majority Uzbekistan - whom the press have dubbed "the bloody nanny" - was detained on Monday as she was waving the child's severed head outside a metro station in northwestern Moscow.

The 38-year-old mother of three sat smug and smiling in a Moscow courtroom for the murder of a four-year-old girl. Photo: AAP

She was sent for psychiatric examinations.

Undated footage later emerged on the Internet appearing to show the mother-of-three saying the attack was "revenge" for Russian President Vladimir Putin's bombing campaign in Syria, which began in September.

Gyulchekhra Bobokulova was allegedly shouting "Allahu Akbar", was spotted pacing up and down outside a Moscow metro station in front of bewildered bystanders. Photo: Artyom Afonsky/east2west news

"I hate democracy. I am a terrorist. I want you dead," the woman allegedly shouted on the street. Photo: Supplied

"I took revenge," she says in the video in response to a question from a man who cannot be seen

"Against the one that spilled blood," she says, dressed in the same clothes she wore in court."

"Putin is bombing. Bombs from airplanes. Why are you bombing Muslim? Nobody talks about it. They also want to live."

The four-year-old victim, Nastya. Source: Moskovsky Komsomolets/east2west

Bobokulova took police to the apartment where she allegedly beheaded the little girl. Photo: YouTube

Bobokulova is suspected of butchering the girl at the family's apartment in northwestern Moscow, before torching it and fleeing the scene.

The 38-year-old told journalists that "Allah ordered" the killing as a judge ordered her held in custody for two months over the murder of the girl, whom investigators say was aged either four or five.

After the appearance of the video, Russia's Investigative Committee - which reports directly to Putin - swiftly released a statement saying Bobokulova has "long been diagnosed with schizophrenia".

A journalist asked the nanny why she murdered the little girl, she replied saying 'Allah ordered me!' Photo: Ruptly

"For a person who has long been diagnosed with schizophrenia, the motive at the moment the crime was committed, as a rule, does not coincide with the explanations given after the event," committee spokesman Vladimir Markin said.

"I appeal to the media: do not make premature conclusions and protect the psychological state of your viewers."