A man allegedly grabbed another male by the throat at Grimsby Town railway station earlier this month.
A man is reported to have shouted at the victim before the assault, which happened at 5.40pm on Saturday, February 8.
It happened shortly after the victim asked the suspect to calm down, who is believed to have been shouting at rail staff over a delayed train.
British Transport released a CCTV image on Thursday, February 20 of a man officers would like to speak to, who they believe may be able to help with their investigation.
Anyone who recognises the man should contact BTP by texting 61016 or by calling 0800 40 50 40 quoting reference number 2000014617.
Alternatively, it can also be reported through the independent charity Crimestoppers on 0800 555 111.