Sirens sounded in northern Israel following a new wave of Iranian missile launches, according to Bluesky. Another source, PressTV, reported that Iranian missiles triggered sirens across the central and southern parts of territories controlled by Israel. Accounts differ on the geographic location of the siren activations. Separately, air raid sirens sounded in northern Israel following a projectile launch from Lebanon, as reported by AP News. Emergency sirens in Israel are used in response to rocket attacks, particularly in areas near the Gaza Strip, and in response to potential aerial threats, according to IsraelByLocals.com. On April 23 at 10:00 a.m., a siren sounded throughout Israel for two minutes in observance of Yom HaShoah, Holocaust Remembrance Day, to honor the six million Jews murdered during World War II, as reported by Lay of the Land Online.