Nearly 100 Jewish children were evacuated from their preschool in Givatayim, next to Tel Aviv, after Arab construction workers at a nearby building site began throwing rocks into the school through a window while doing obscene gestures towards staff members.
The children were all inside the preschool at the time, which is why no one was injured.
A school staff member witnessed the attack when she went to the kitchen and saw the construction workers throwing rocks and cursing the Jews inside.
Police were called to the scene, and arrested two of the Arabs involved.
The perpetrators were later released on bail with a restraining order.