21 people were injured by pepper spray at London Heathrow Airport on Sunday, police said.

A man has been arrested on suspicion of assault after number of people were attacked with “a form of pepper spray ” by a group of men at a car park at Heathrow Airport, UK police said.

Five victims have been taken to hospital, with a total of 21 patients cared for at the scene, the London Ambulance Service (LAS) said.