On Tuesday, British Transport Police released an image of a person they want to speak with about the incident on the evening of Oct. 3 at the London Underground’s High Street Kensington station.
The health worker approached two men and a woman and asked why they were traveling without face coverings, police said
One of the men punched the worker in the face and threw him from the train onto the platform, according to investigators. The victim suffered serious injuries, including a chipped jaw and three breaks to his eye socket, the British Transport Police said in a statement.
The group remained in the train car as it pulled away from the station.
They said the man in the image may have information that could help the investigation. He has short blonde hair and is wearing a dark suit and light shirt with no tie. He was carrying a green umbrella, and a gray and blue Nike bag.
Earlier this month, video made the rounds on the Internet showing a London supermarket shopper trashing a Tesco store after a worker reportedly asked him to wear a mask. He was arrested on “suspicion of criminal damage” and accused of assaulting a store employee.
Attacks on workers and security guards trying to enforce face covering requirements have been violent in the U.S. as well.
Two Chicago sisters were ordered held without bail Tuesday after a store guard who asked them to mask up was stabbed 27 times and punched in the face