Officers have appealed for witnesses to come forward with information on a violent disturbance in Skegness last month.
Several people were arrested by Lincolnshire Police in relation to the affray outside the Asda petrol station on Roman Bank at approximately 5.15pm on Monday, October 24.
Detective Constable Phil Graves is seeking to trace two key witnesses who may be able to help with the investigation.
One is a man who attended the petrol station on a mountain bike along with two boys also on mountain bikes.
The other is a man who was using the ATM at the petrol station at the time of the incident.
These people were not involved in the incident but are believed to have witnessed it.
Other bystanders who could have seen people with any sort of weapons during this incident are also encouraged to come forward.
Anyone with information should contact DC Graves at Skegness CID on 01754 614351, quoting incident number 335 of October 24.
Alternatively, call the independent charity Crimestoppers anonymously on 0800 555 111.