A man escaped with cash following a raid of a bookmakers in Sheffield city centre.
He struck at William Hill on Orchard Street and threatened staff as he made demands for money during the raid.
CCTV images have been released of a man who could hold vital information about the incident at around 9.15pm on Friday, March 10.
A South Yorkshire Police spokesman said: "Police want to speak to this man, who may hold information that assists with their investigation into a reported robbery at a city centre bookmakers.
"A small amount of money was taken from the William Hill office on Orchard Street in Sheffield at about 9.15pm on Friday, March 10, when a man walked into the building and made demands for cash from the till."
Call South Yorkshire Police on 101.