Humberside Police have released CCTV images after disorder broke out on the streets of Cleethorpes.
A group were involved in “a 10 minute prolonged period of disorder” just before midnight on Christmas Day into the early hours of Boxing Day on High Street, close to the junction with Cross Street, Cleethorpes.
Officers have not identified a group of four victims, or two groups of alleged offenders.
As part of their investigation, CCTV images have been released of both the victims and the offenders.
Officers are asking anyone pictured to contact them on 101, quoting incident number 1 of December 26.