I was doing some rank 2 missions and was at mission area killing off the MOBs.  The closest mobs to this group where around 1000 clicks away from me.  I would be plugging away at the mission mobs when I would suddenly be getting lit up from behind.  It is usually one but sometimes two mobs from the neighboring groups would have come over and when I try to break aggro they shoot really quickly back to their area.  Lost a Baephomet to this and lag last night... lagged out and had all the mission mobs and 2 other mobs on me and couldn't get away due to being snared X2.

What is the aggro range on mobs?  The other mobs where, like I said, around 1000 meters away from the mission area I was at.