CCTV stills have been released showing three men police want to speak to in connection with a serious assault.
Police have released the images to encourage members of the public to come forward to help them solve the crime that happened last summer.
The appeal is in connection with the assault on the N207 bus on the Uxbridge Road between Lansbury Drive and Church Road on June 26 last year, around 3.45am.
Three black men attacked two white men travelling on the top deck of the bus, and one of the victims was knocked unconscious.
The first suspect is described as black, around 25 years-old, with black braided hair. He was wearing a long sleeved black top and dark trousers.
The second is also black, around 25 years-old, with black cropped afro style hair.
He was wearing a white T-shirt with lettering on it.
The third suspect is black, around 25 years-old, with black cropped hair. He was wearing dark clothing.
Anyone with any information is asked to contact PC Raydon Joyejob on 0208 246 1861 or call Crimestoppers anonymously on 0800 555111.
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