Dramatic footage shows the moment police tasered and arrested a 36-year-old man after a stabbing attack in northeast London.
A 14-year-old boy was killed and four people, including two police officers, were left injured after a man went on a rampage in Hainault.
Police were called to reports that a man was wielding a sword and attacking members of the public at around 7am.
Follow latest updates on Hainault sword attack
The suspect was arrested 22 minutes later and the doorbell footage shows the moment officers cornered the hooded man, who was still holding his weapon, in a driveway.
At least six officers can be seen moving towards the suspect and shouting. He is then tasered, before the officers pinned him down and arrested him.
The man is now in hospital after suffering injuries when his van crashed into a building, police have said.
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