The police claim the Mackems were looking for trouble, and their actions were acceptable, but three football fans needed hospital treatment for dog bites.
One Sunderland fan was allegedly left lying on the ground for four minutes, covered in blood.
The Mackems do have a reputation at Central Station, however.
A gang of Seaburn Casuals attacked the Irish bar across the road from the train station when the IRA set off a bomb in Manchester several years ago.