Responses
It’s implied that they were humans, not zombies. The kid is familiar with the area, runs through a bridge/path that otherwise wouldn’t be obvious, and all the way into the hall. He tried to return to the camp he belonged to and was probably followed/noticed by Guwon, or Guwon found them himself at some point.

Why are people so mad at guwon are those people human or zombies.I thought they were zombies and that why guwon attacked them.