These zombies can be found in the second level of the security stronghold in various locations. They are aggressive and will attack anyone. The level 30 zombies have 30 hp. They can drop steel arrows(5-14), body runes(4-14), beer, uncut ruby, uncut emerald, uncut sapphire, coins, bones, bottom of sceptre. I'm not sure of the rates. For the level 30's, you get about 120 xp towards your method of attack(melee) and 40 xp in hp.
not sure how to format this if someone would be so kind as to help