Police are asking for help in identifying two men wanted in connection with abusing staff in seperate incidents at a London Underground station.
The CCTV images show one man, pictured wearing earphones, is suspected of pushing a member of staff at Hainault Tube station at around 7.30pm on October 7 last year.
The second man, pictured wearing a black coat, is wanted in connection to racially abusing and threatening a member of staff at the same station in New North Road, at around 7am on November 6 last year.
Detective Inspector Jim Chamberlain said: “Tube staff should not have to endure abuse or violence for simply carrying out their job.
“Officers investigating each of these cases have carried out a number of enquiries to try and establish the identity of these eight people, including speaking to witnesses and circulating images on police intelligence systems, but to no avail so far.
“We’re now asking for help from the public to identify them. If you know any of these eight people and can tell us who they are, we want to hear from you.”
Anyone with information should call British Transport Police on 0800 40 50 40 or Crimestoppers on 0800 555 111.