Hey is it really true that when filming the movie Exorcist the set was caught on fire?

I was going to watch this movie on youtube until someone mentioned about the curse of this movie and 9 people died while filming. I looked it up and it only mentioned a little about what really happened. Im not sure if I should watch this movie cuz I'm afraid of this curse that people are talking about...(btw I love horror films but this is actually giving me goosebumps)