While going to explore/patrol the catacombs, I ran into a pack of what I assumed were 10-20 pc created undead that were then released. Some were hostile, others were blue. They were very close to the transition, I was attacked soon after I entered.
When I auto-attacked back they all turned hostile. Some of them chased me out through the transition. When I attacked the undead in the Peerage Ward, the NPC guards turned hostile and started attacking my pc and summons.