[tumitishdu]

Hi there, this is my first post and I've been looking for a horror movie or a tv show for many years and I have still not found it, I decided to sign up to this forum and ask you guys if you know it. I can't remember if this was a mini series or a film but I saw this film/show maybe 20 years ago. I don't remember much from it but I think this was a european film but im not sure, and the scenes I remember is that there was a monster or somekind of disgusting creature that was trying to kill people that were locked in a school or atleast a large building. I think there were police officers outside the building but for some reasons they couldn't get in and the people inside were locked in with this creature (Not the movie Relic) I also remember some kind of air ventilation scene were the monster was hunting down a guy in a ventilation. But I don't remember anything else. I know this is little to work with but if you have an idea what this film/tv show is I would love to know.
The monster looked like a zombie but it was not a zombie (humanly figure).
Thanks alot :)