According to the Israeli Defense Forces, sirens were sounded in the Golan Regional Council in northern Israel.
The exact areas that may be affected are unknown. According to AP, 20 projectiles were fired by Iranian forces in Syria at Israeli positions. Some of them were intercepted by Israel.
Initial report: A short while ago, sirens sounded in the Golan Regional Council in northern Israel
— IDF (@IDFSpokesperson) May 9, 2018