Not a munitions depot per se, but rather the operations center where collected Israeli dud mines, shells, rockets, cluster bombs, etc. are disassembled and re-engineered into shaped charge, improvised explosive devices. Following Iranian training, these will be employed in the next conflict quite effectively, just ask the Americans in Iraq and Afghanistan. Big thanks to the UN, Clinton, Obama etc for this . . . eh?
12 Iraqi troops, militiamen killed in multiple ISIS suicide attacks (AP)
from the article: Lebanon: Shell caused blast at Hezbollah official's home