The Iranians showed footage from inside the site where the explosion happened and it sure looks like gas containers blown up, however, sabotage could always be a faction since so many of the super evil and capable parties want to destroy one of the last independent countries in the world especially after showing not only resilience but also achievements in all fields and this was the lastest: https://www.syrianews.cc/hesa-kowsar-iranian-indigenous-fighter-jet-takes-off/