A young man was allegedly robbed in Alfreton town centre.
Police are appealing for witnesses after a 24-year-old man claims he was punched and robed near the Lucky Star Chinese takeaway on High Street at about 9.40am on Wednesday.
He was unable to describe his attacker other than to say he was of large build.
Detective Constable Thor Long, who is investigating the allegation, said: "The town centre would have been quite busy at the time and I'd like to hear from anyone who saw anything suspicious.
"No witnesses have come forward yet.
"I will be checking local CCTV for evidence but I'd like to speak to anyone who was in the area of High Street between 9.30 and 10am."
Witnesses or anyone with information should call DC Long on 101, quoting crime number 22588/16, or Crimestoppers on 0800 555 111.