Maybe just throw the hospital fire into the report as a red herring, to get them to chase their tails for a while, looking for a connection?
No idea - it could have been an accident, incompetence (separate from accident), sabotage or a deliberate attack. No way to tell, but if it was hostile action, I wouldn’t put it past an attacker to use even a genuine hospital as a distraction. Remember, Israel and the Western powers aren’t the only enemies Iran has and a lot of them have less scruples than even Iran.
Or it could just be someone bought a bad set of gas handling equipment and installed it everywhere.