Detectives are appealing for witnesses to come forward after an off-duty police officer was assaulted on the London Underground.
At about 7.50am on Thursday 23 January the two men began to argue on the westbound District Line service between South Kensington and Gloucester Road.
Following this altercation, the man punched the officer to the left side of his face, causing an injury to his eye.
A man in his 20s from Hertfordshire was arrested at the scene on suspicion of assault causing grievous bodily harm, assaulting an emergency worker and possession of a Class B drug.
Did you witness the incident, or do you have any information which could help the investigation?
Anyone with information can contact British Transport Police by texting 61016 or calling 0800 40 50 40 with the reference 2500008658.
Alternatively, you can contact Crimestoppers anonymously by calling 0800 555 111.
