This was the moment Metropolitan Police seized a large knife from a man in London yesterday (10 September).<br /><br />Officers are seen in Darnley Road, Hackney, subduing a man at a bus stop to retrieve a large knife from him which is then displayed by an officer to the public.<br /><br />The arrest occurred at Hackney Carnival in North London, the carnival took to the streets of the Borough all day where revellers embark on a parade with over 1000 performers. <br /><br />The filmer said: "I managed to see 3 officers trying to arrest this tall black boy about 6’1 19 years old for carrying a knife about 8-12inches long."<br /><br />He later added: "The police began to use excessive force to arrest the suspect, one of the policemen started punching the suspect in the stomach so he could stop resisting."