Horrific new details of how a nanny beheaded a four-year-old girl and paraded through the streets of Moscow with her severed head have been revealed.
The woman, dressed in a burka, threatened to blow herself up as she walked near Oktyabrskoye Pole metro station holding up the little girl's head.
Investigators claim she murdered the girl, who is believed to have learning difficulties, after starting a fire at the child's family home in a block of flats.
The nanny, Gyulchehra Bobokulova, 38, from Uzbekistan, has been arrested.
It is now known that the beheaded remains of the girl, identified as Anastasia (Nastya) Meshcheryakova, were discovered inside her cot. Her body had been dressed in her night clothes, consisting of a T-shirt and shorts.
According to local media, Bobokulova shouted in the street: I am a terrorist. I want you dead.
'You have become so hardened, you have eliminated so many of us. Look I am a suicide bomber, I will die, and doomsday will come in a second.'
She pulled the severed head out of a bag and walked near the metro station entrance in north-west Moscow.
Video of the dead girl's mother, Ekaterina Meshcheryakova, collapsing in the street upon hearing the horrific news has emerged. She was taken to hospital in an unconscious condition.
Anastasia also had a father, Vladimir Meshcheryakov, who is a technician at a mobile phone company, and a brother Konstantin, 15.
The woman is being detained for a forensic psychiatric examination.
A criminal investigation is continuing.
Some rights activists warned of a possible backlash against migrant workers from Central Asia who have in the past been targeted for beatings by far-right groups.
Security services are on high alert for a possible terrorist attack after a Russian passenger plane was blown out of the sky above Egypt in October, killing all 224 people on board. Islamic State said it was responsible and had acted to avenge the Kremlin's decision to launch air strikes in Syria.
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