'Israel overnight strike targeted Iranian missile shipment meant for Hezbollah'

How do the  Israelis come to know about these terrorist weapons? Excellent intelligence ?

Only a few days after an alleged Israeli strike, Syrian media reports Israeli rocket fire targeted a military research center; Western intel sources confirm Syrian reports, say targets were Iranian Fateh-110 surface-to-surface missiles

he sources said the target was a shipment of Fateh-110 missiles. The Fateh-110 is a medium-range advanced guided missile capable of hitting targets at a range of up to 300 kilometers.