• The 41-year woman was still in pyjamas when she was arrested by Scotland Yard

A screaming woman, who was covered in blood, was led away in handcuffs from the murder scene of a four-year-old boy, according to shocked neighbours. 

Police have launched a murder investigation after the young boy was stabbed to death at a house on Montague Road, Hackney, East London on Wednesday night. 

The 41-year woman was still in her pajamas when she was arrested by police after they were called to the address following concerns about the child's welfare. 

Horrified neighbours who had often spotted the 'happy' boy playing on his scooter, also witnessed two police officers leave the scene visibly 'shaken' after finding the child with stab wounds.

The boy was taken to hospital for treatment but despite the best efforts of the emergency services, he subsequently died from his injuries. 

A local woman in the quiet and leafy neighbourhood told the PA news agency that a 'loving family' lived at the address.

The 36-year-old hairdresser, who asked not to be named but could see the address from her home, said police forced entry to a flat on the top floor before taking away a woman who was 'covered in blood and screaming'.

The neighbour said they 'seemed like a loving family' and added: 'We often saw the boy playing on his scooter. He was happy and energetic.

'The woman was taken out in handcuffs. She was in her pyjamas. She was covered in blood and screaming.

'About an hour later the child was taken away. Two police officers also left (and they were) shaking.'

The boy's next of kin have been informed and are being supported by specially trained officers.

The Metropolitan Police said they are not looking for anyone else in connection with the attack.

Detective Chief Superintendent James Conway said: 'This is an extremely distressing incident which will understandably cause shock and disbelief amongst the local community and those who attended the scene.

Police have launched a murder investigation after the young boy was stabbed to death at a house on Montague Road, Hackney, East London on Wednesday night

We are working with our partners, including Hackney Council and the school community, to ensure support is there for people who need it.

'Specialist officers from our homicide team are progressing this investigation and continue to work to establish the circumstances of this young child's death, and the events that led up to it. 

'This incident occurred within the home and, while is no wider public safety risk, additional officers will be present in the area as we recognise the impact this will have on the community.'

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