01/22/2015 08:19 EST | Updated 03/24/2015 05:59 EDT

Science demonstration sends students, teacher to hospital

One teacher and three students were treated for minor injuries after a science demonstration went awry in a private school's parking lot. 

Emergency personnel were called to Royal Crown Academic School near Bayview Avenue and Finch Avenue shortly after 3 p.m. Thursday for what was originally described as a chemical explosion. 

It turned out to be a failed science demonstration in the school's parking lot. A plastic pop bottle containing a drain-cleaning substance had tipped and ruptured, spraying two girls, a boy and the teacher. 

The teacher drove them to North York General Hospital, where they were treated for minor injuries.