From The Washington Post:
The official Syrian Arab News Agency said that a scientific research facility had been struck by an Israeli missile...
Reuters reported that an Israeli military spokeswoman had refused to comment, but the Associated Press quoted an anonymous Middle East intelligence official as confirming the state media reports. The target was Fateh-110 missiles, which have precision guidance systems with better aim than anything Hezbollah is known to have in its arsenal, the official said.
Syrian report: Israel bombs outskirts of Damascus for second time in recent days - The Washington Post
Such missiles, if they were received by Hezbollah, would strengthen that terrorist organization's capabilities. Israel's targeting their shipments and facilities in which they are manufactured (probably Syria's reference to a "scientific research facility") makes sense. Israel, like any other nation, has to be prepared to safeguard its vital interests.