A cyclist who attacked a group of people after he fell off his bike, left a women with a broken nose and a man knocked out cold.
CCTV footage shows a man riding his bike on the pavement in Hackney in London.
Three people were walking together when they were approached by the man, who collided with them.
He fell from his bike, got up and throws his bike against a fence, before charging back towards the trio.
According to police he then approached the victims and remonstrated with them before launching an unprovoked attack, punching a 24-year-old man to the ground who was left unconscious.
A 31-year-old woman was punched in the face and suffered a broken nose.
The man police are calling a suspect then went to retrieve his bicycle and rode off towards Islington.
The incident happened at around 3am on Sunday, August 13.
Officers described the man as black, aged in his 20s and was wearing a dark polo shirt and black trousers.
He also had a distinctive large beard
PC Matt Jolley said: "This was a callous and needless assault."
Anyone with information is asked to contact Hackney police via 101.