Vandalism has become a frequent occurrence at Milton District High School.
For the fourth time this month, unknown suspects targeted a portable at the Williams Avenue school, this latest time in the early morning hours Friday (Dec. 20).
Halton police media relations officer Ryan Anderson reports that at about 1:20 a.m. a window of one of the portables was smashed, though the classroom was not entered.
No other damage was caused and no suspect description(s) are available.
Previous incidents saw extensive damage to the portables, with laptops destroyed and a table thrown through a window, as well as fire extinguishers set off inside.
The investigation continues.