What I do know is an alarm was sounded. Fire fighters arrived. Despite the alarm no one found the fire. They reset the alarm and the fire fighters left only to return when the fire was out of control.
How comprehensive was the search that no one located the fire or at least smoldering embers producing the smoke that set off the alarm?
Let's say it was an accident. Let's say it was arson. Either way, all the people looking for the fire during the first alarm didn't find the fire.
All the people whose job it was to locate the fire during the first alarm failed to find the fire.
Why?
Did they rush through the search? Did they do a proper search?
All the people whose job it was to locate the fire during the first alarm failed to find the fire.
Why
So that may be the reason. The fire guys were used to looking for flames and smoke, since there was none visible (unless they climbed up to the roof and pulled back the lead sheeting) they left.
Also, were the fire guys mussulmen? If they were did they leave winking and smiling at each other in preparation for later celebrations?