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.

Hundreds of school children perform Leicestershire "big sing"
Lorry overturns on A46 in Leicestershire
Arrest after report of rape in Nuneaton
Leicestershire Hospice gets NHS funding boost
Why an 8-year-old from Hinckley dressed as herself on World Book Day
Petition to save 800-year-old Leicestershire pub
People urged to get their covid jab in the next two weeks ahead of restrictions lifting in England
How to get your Covid vaccine if you're over 18