British Transport Police want to speak with these men in connection with an alleged robbery at Acocks Green Railway Station.
Officers are keen to speak with the men after a 21-year-old allegedly had his phone, cash and cards taken from him at knifepoint.
British Transport Police, who released the CCTV images, say the incident took place at 6.30pm on July 30.
A force spokesperson said: “A 21-year-old man was waiting in the shelter on the platform when he was asked by two men for a cigarette.
“He refused and one of the men then produced a knife and demanded he hand over his possessions.
“The pair took the victim’s phone, cards and cash.
“The victim pushed one of the men away and in doing so spotted that he was carrying what looked like a gun.
“The two men then fled the station through the main entrance.”
Anyone with information or recognises the men should contact British Transport Police texting 61016, or call 0800 40 50 40 and quote reference 455 of July 30.
Alternatively call Crimestoppers anonymously on 0800 555 111.