Two Grade 3 students were taken to hospital after hot asphalt seeped through the roof of their North York school on Monday.
Police say workers were retarring the roof of Derrydown Public School when the incident occurred around 1 p.m.
Ryan Bird, a spokesperson for the Toronto District School Board (TDSB) said liquid asphalt landed on two 8-year-old boys during their gym class. One boy got some of the substance on his arm, while the other only had a few drops fall on him, Bird said.
Toronto paramedics say both boys suffered minor injuries and were taken to hospital.
A third student, an 8-year-old girl, also had asphalt drip on her but it hit her clothing, not skin.
The school, near Finch Avenue and Keele Street, has some 500 students from junior kindergarten to Grade 5.
Linda Sue Thomas, the school’s acting principal, sent a letter to parents saying the school is suspending the roofing work.
Meanwhile, support workers will be available for any students troubled by what they saw, the letter said.
Toronto parents have sounded the alarm about similar incidents involving industrial work near schools.
In January, a girl outside Palmerston Avenue Junior Public School was hit in the head by falling construction materials.
Last week, video emerged of an excavator bucket narrowly swinging past a classroom window at Eglinton Junior Public School.