Victoria police are looking for witnesses after 15 windows were broken at South Park Elementary School in a three-week period.
Damage has been in the thousands of dollars.
The problem was first reported Aug. 6 by maintenance workers who called police after noticing that several windows had been damaged by rocks. Similar incidents were reported Aug. 23 and this past Sunday.
Police said the majority of the incidents are happening on weekend evenings.
As well as appealing to the public for information, police are asking for help from the James Bay Neighbourhood Association and the James Bay Block Watch.
Call Victoria police at 250-995-7654 extension 1 or call Greater Victoria Crime Stoppers at 1-800-222-8477.