Police are appealing for witnesses after a man and woman were allegedly assaulted on Norfolk Street in Glossop.
At around 2.10am on Saturday, December 13, a woman came into an argument with a man on Norfolk Street when another man stepped into to break up the argument.
The offender is then believed to have punched both the woman, and the man who stepped in, several times.
A 22-year-old man was later arrested and questioned by police before being released on bail.
Anyone with any information about the incident is asked to contact PC Julie Shaw on 101, quoting crime number 53226/14.
Alternatively, you can report a crime anonymously by calling Crimestoppers on 0800 555 111.