From NEWSDAY.COM: 

Boys Start Steamroller, Damage School

BELGRADE, Serbia-Montenegro — A group of school boys allegedly started steamroller Tuesday, which ran out of control and smashed into a school in central Serbia, a Serbian news agency reported.

No one was injured in the accident in Gornji Milanovac, 50 miles south of Belgrade, but the school was seriously damaged by the 4.5 metric ton piece of machinery, the Beta news agency reported.

(more here)