No, it was very much open to interpretation. You don't really see anything clear, it's just as ambiguous as the rest of the movie. For me, the film is all about how fear leads people to do crazy things - the witch hunt is exactly what witch hunts really were. Demonising perfectly normal people based on mere suspicions.
@Water Bottle it is not a fact... For one thing, it's just a movie and I can interpret however I like. Secondly, there are plenty of critics who agree with me about there being no supernatural, and even more who say the film is at least open.
I personally love the fact that people can get completely different things out of the same movie.