Read the article they're pretty clear. That might not be the exact truck with rockets in the bed that they're using, but it's something very similar that are still called Katyusha. Widely exported by the soviet union to over 50 nations for decades... in other words only an idiot wouldn't believe it is incredibly easy to get your hands on.
Frankly, only a brainless dont know what are Katyushas and that palestinians never got such weapons, only states have theses, one who is not an idiot could rapidly deduce that you dont smuggle such heavy weaponry, or do you think that they built an underground highway..??..
