Last week, the Observatory said an Israeli strike on Mazzeh killed four people, including the son-in-law of the late Hezbollah leader Hassan Nasrallah, killed in an Israeli air strike on south Beirut last month.
Israeli authorities rarely comment on individual strikes in Syria, but have repeatedly said they will not allow arch-enemy Iran to expand its presence.
Iran and Lebanon’s Hezbollah have been among the Syrian government’s most important allies in the country’s more than decade-old civil war.
More than 400,000 people, most of them returning Syrian refugees, have crossed into Syria over the past two weeks, fleeing heavy Israeli air strikes on Lebanon.
