The team managed to open a couple of doors. What is that inside the buildings?

Objective: Find and recover the artifact from the doorless vault in the middle of the forbidden city. Only one player need leave the city with the artifact to win the challenge.

Players turn from day before:

(3) rayne122 [torch, gasoline, x-bow] Shoots at the Runner in the Eastern spawn zone but misses it. Searches the car and finds a Molotov. Moves South.
(2) vanquish [axe] Moves North and breaks open the door. Moves East.
(4) justatouchfey [x-bow, axe] 2 swings with the axe takes the door down, then an arrow from the x-bow takes down the Walker within the first room.
(5) pandorasbox [bat, torch] Using the bat, 2 Runners are smitten. Moves South.
(1) safat [pistol, torch] Moves South and shoots the Runner in the Eastern spawn zone. Searches and finds a Walker.

Players can see a spreadsheet with their inventory here:

https://docs.google.com/spreadsheets/d/1k5jXGMU9CF-9V3ZCz2YHGP7aswEiTizxfu4SBy-s2vI/edit?usp=sharing

Zombie Turn after the players made the above moves:

All zombies pre-existing on the board move: The Walker found by Player 1 attacks, rolls 6 = success. Player 1 suffers 1 damage point. The Runner from inside the S/E building runs out to meet players 3&4.
Zombies spawn at spawn sites:
left rolls a 4 = Walker.
top rolls a 3 = Walker .
right rolls a 5 = Runner.