R you sure it is a bomb sniffing dog and not a cadaver dog, that searches for death or a rescue dog that searches for life. With a Bus involved, I would think it is for those in the tunnels.
In response Patricia Madonna to her Publication
Not sure 100% but since that bus was headed into the fenced off area and not leaving the fenced off area, more then likely a bomb sniffing dog or it could also be a multi purpos dog as i think some dogs can do more then 1 task.