Here is your Hizbullah expert: the on-line detective

"Based on these official Hezbollah and pro-Hezbollah sources, I counted a total of 20 Hezbollah members killed from the period starting on May 18 until mid-day on May 20. Due to the timing of the announcements, it stands to reason that a majority of these fighters died while engaged in the heavy fighting around Qusayr. " (thanks Peter)