Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts. Broad, wholesome, charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one's lifetime. Mark Twain
I cannot imagine being a parent of someone at the school. Even if you have heard that they are safe, how do you ever let your kid out of your sight again?
Do you know if this is near the chemistry demo lab? That's where my friend works.
If it is one of the main chem labs, then they are very close to that area, but I have not heard any of them named as being directly involved in the situation. It would definitely be a building where people would be sheltering in place. I hope your friend is ok!
So far, still hearing 8-9 injured, but up to 7 of them have been confirmed as having non-life threatening injuries. I have heard only one in critical condition.