A mother confronted the Woolwich attackers, asking them to hand over their weapons and warning them: "It is only you versus many people, you are going to lose", it was reported.
Ingrid Loyau-Kennett, 48, told the Daily Telegraph that one of the attackers said to her that they "want to start a war in London tonight".
"So I thought 'OK, I don't know what is going on here' and he was covered with blood. I thought I had better start talking to him before he starts attacking somebody else. I thought these people usually have a message so I said, 'what do you want?'"
Mrs Loyau-Kennett said that the attacker seemed to be "in full control of his decisions and ready to do everything he wanted to do."
The mother-of-two, a cub scout leader from Cornwall according to the report, added: "Being a cub leader I have my first aid so when I saw this guy on the floor I thought it was an accident - then I saw the guy was dead and I could not feel any pulse."