Movie with crashed UFO and floor panels that light up (and kill the people standing on them)

Looking for a sci-fi movie, probably late 1950's or early 1960's. I'm pretty sure that it was B&W. The only thing I can remember is that people were trying to walk across what I think was a crashed UFO. The panels would light up and if they were on them at that time they would collapse (and die I think). I know that it's not much to go on but I was young and I've never been able to figure this out.

Thanks!