Two rocket launches were identified by Israeli air defense in Ashkelon, two more in Lachish Regional Council.
A diplomatic source said the hacker identity is uncertain, but suspicions have been raised that the cyberattack was carried out by Iran.
IDF: Iron Dome missiles fired towards misidentified Israeli platform
The IDF confirmed that an anti-aircraft missile fired from Syria set off the sirens and that the missile exploded mid-air.
According to the IDF, the rocket alerts were a false alarm and the circumstances are under examination.
Hamas welcomed the Hezbollah attack and said that it fully supports the "resistance in Lebanon" in its fight against "the Zionist aggression."
The Iron Dome missile defense system intercepted 10 rockets, with six falling in open areas; the others fell inside Lebanon.
During the exercise, sirens will be sounded and residents will be asked to head to the protective areas to ensure they are ready for real-life scenarios.
Sigal Ariely’s house in Ashkelon in southern Israel lies in ruins after a Hamas rocket scored a direct hit mere hours before a cease-fire went into effect
Moves being made in the Foreign Affairs and Defense Committee to extend protection from rockets to 15 km.