Video footage has emerged on social media of a man threatening passers-by with a knife in Watney Market, Shadwell on Tuesday 22nd May.
WARNING: Scenes of violence and offensive language.
The video shows three passers-by as they try to tackle the man as he moves along Watney Street.
Police officers from Tower Hamlets soon arrive and arrest him. It is not believed anyone was injured.
It is believed the man was suffering from mental health issues.