A man has been arrested in Winterthur after he attacked a motorist with a knife following an accident.
Police say the 37 year old was driving too fast through the centre of town when he collided with another car – which then ended up on its roof.
He then got out of the car and threatened several people with a knife before attacking the 21-year-old driver of the other car, slightly injuring him.
A passer-by restrained him until the police arrived.