This is very serious news for Hezbollah. The party boasted for decades it effective internal counter espionage capabilities, especially the vetting processes. It is the first time I hear of such arrests; one of those arrested is a Southern Cadre in Hezbollah, Mohamad Atwi from Harouf. I am skeptical about media reports, but the fact that the party has not responded to the speculations lends credibility to the news. Here is the report in English about the arrests of Israeli spies within Hezbollah's ranks. I am trying to understand which Hezbollah official's brother was arrested.