A missile fired by Palestinian terrorists operating out of the Gaza Strip slammed into a school in the southern Israel coastal city of Ashkelon on Saturday, destroying several classrooms.
Being the weekend, the building was empty at the time of the attack.
The rocket used in the attack was described as an advanced version of the Palestinians' locally developed Kassam rocket, indicating that Gaza terrorists are increasing their firepower.
Nine other rockets hits southern Israel on Saturday, and another two rockets were fired on Sunday.
At least two people were wounded in one of Saturday's attacks.
Israeli Prime Minister Ehud Olmert promised a "painful" response to the attacks, and noted that Hamas is trying to reassert itself after suffering a heavy blow at Israel's hands in the recent Gaza war.
In other violence, two Palestinian Arabs wielding metal pipes attacked an Israeli taxi driver outside a small Jewish town in Samaria on Sunday and stole his vehicle.