CCTV images have been released of two men and a woman - possibly from Sheffield - who detectives want to speak to over an attack at a takeaway.
They were released as part of a police probe into an attack at Pizza Royal on Corporation Street, Chesterfield, which left a 23-year-old man with a broken nose and fractured jaw.
Derbyshire Police said the victim was involved in a verbal argument inside the takeaway and was later attacked outside the shop.
He was punched several times to the face and head during the incident, which happened just before 4am on Monday, March 20.
Police believe the men and woman could hold vital information.
A Derbyshire Police spokesman said: "Since then, our officers have been speaking to a number of people but we are now turning to the public for further help.
"The CCTV images show three people - two men and a woman - who we want to speak to in connection with the incident.
"Do you recognise them? It’s possible that they are from the Sheffield area."
Call DC Nathan Allen at Derbyshire Police on 101.