Yes, a little more information would help. What can you tell us of the circumstances? How old were they? How many did you have?
Sometimes chicks die, then are stepped on. Sometimes if you have a lot, they will get frightened and pile in a corner, with those on the bottom getting crushed. Or maybe they are getting cold at night and piling up. I've seen mine step on each other a lot without any dying. I think there is probably something else working there, other than just being stepped on.