Festive cheer and goodwill was in short supply in Newtown when people dressed as Santa were involved in a mass street brawl, say police.
Officers used CS spray and batons to break up trouble amongst up to 30 people, following Newtown's annual charity Santa run.
There were five arrests hours after around 4,000 Santas finished racing.
Race organisers said if any official participants had been involved in the trouble, they would be banned in 2005.
Those arrested have all been released on police bail while further inquiries are carried out, Dyfed-Powys Police said on Thursday.
A number of others have been interviewed about their alleged involvement in the incident in the town's Severn Street on Sunday, which happened shortly after 2230 GMT.
Four officers suffered minor injuries during the scuffle and a total of eight were used to quell the disturbance, said police.
