A 14-year-old boy has died after an attacker armed with a sword went on the rampage in Hainault, north-east London.
Four other people, including two police officers, were injured before the suspect - who had been leaping over people's garden fences - was cornered and tasered in a front garden.
Police say a 36-year-old man was arrested but his condition meant he had not been interviewed yet.
Watch the key developments of the day in Hainault, which police say "shocked everyone".