Police are investigating a serious assault which happened outside the Lincoln Wilkinson’s store on Waterside South.
The attack reportedly took place on Sunday, March 17 between 12 and 2pm.
A victim was left in hospital with serious but not life threatening injuries.
Lincolnshire Police were not able to provide ages or genders of those involved, adding investigating officers have limited information and no CCTV images.
Anyone who witnessed the incident should call the force on 101.