Similar movie with multiple santas
I remember watching a movie on US television when I was younger (probably late 80's, early 90's) that sounded very similar to this film but with one difference. The villains took over a yellow school bus full of children and a teacher but to the best of my memory all the guy's were dressed up as Santa from head to toe and I think they had guns. That is really all I can remember from it and am just wondering if I am remembering it incorrectly and it actually is this film I am recalling..or if there actually is a movie tied to what I described. Any help is appreciated.