A letter posted on the Torrey Pines High School website announced classes and afterschool activities are canceled Thursday due to a threat made by a former student.
![](https://media.nbcsandiego.com/2019/09/NBCOTS_Sandiego_Greyscale-e1586553184308.png?fit=1920%2C1281&quality=85&strip=all&w=400&h=44&crop=1)
A letter posted on the Torrey Pines High School website announced classes and afterschool activities are canceled Thursday due to a threat made by a former student.