Five fans in the away end were arrested and another seven were ejected from the game MK Dons and AFC Wimbledon on Tuesday night.
The turbulent relationship between the clubs led to extra security to be drafted in by Dons for the Captial One Cup first round clash at stadium:mk.
Of the five arrests, two were on suspicion of assaulting stewards on patrol during the match.
A late penalty for AFC sparked a mini-pitch invasion, and an investigation into the incident is being carried out by MK Dons, and may result in further arrests.
There were no arrests in the home end, and there were no reports of damage to cars in the car park.