A man was attacked after confronting a motorist who threw litter out of his car window.
The motorist was driving along Lowgates in Staveley when he spotted rubbish being thrown from the vehicle in front.
Derbyshire Police said the man who spotted the litterbug sounded his horn and both cars then stopped. An altercation between both drivers took place and the men ended up on the ground.
Three other men from the litterbug's car then got out and attacked the other man. An 18-year-old man has been arrested on suspicion of assault. A Derbyshire Police spokesman said: "On Tuesday, April 19 at 2.30pm a man was driving along Lowgates in Staveley when he saw someone in the car in front throw rubbish from the window and sounded his horn.
"The driver in front gestured out of the window to him and both cars stopped.
"An altercation took place between both drivers and they ended up on the floor. Three men got out of the car in front and hit the other driver.
"Police were called and an 18-year-old man was arrested on suspicion of assault."
Anyone with information should call PC Steven Gilburn at Derbyshire Police on 101 or Crimestoppers on 0800 555 111.