Officers have released an image of a man they want to speak to.
The incident happened inside a shop in Main Street at around 7 pm on Friday 3rd September.
A 30-year-old woman, who worked in the shop, was punched in the stomach.
PC Hollie Woods, said: “I’d like to speak to the man pictured as I believe he may have information about this incident.
“If you recognise him – or indeed you are that person – then please get in touch.”
You can pass on any information via the Leicestershire Police website.

State-of-the-art endoscopy unit at Leicester General Hospital welcomes first patients
M1 motorway closed following lorry fire
New rules in place for bird keepers in Leicestershire
£3m upgrade for Council’s passenger transport fleet
Video technology sees faster treatment for stroke patients in Leicestershire
East Midlands Airport Assisted Travel service wins national award
Plea to parents to get children protected from measles