I'm trying to identify a film which shows a group of East Berlin folk trying to tunnel under the wall and escape to the west. I can't remember the name or any actors in the film as it was one I watched in my childhood.
I remember the near the end of the film, the tunnel collapses and some of the people die or get caught on the east side. I think the tunnel started in a warehouse from memory and part of the tunnel was under a large puddle which eventually caused the roof to collapse.
Any help would be greatly appreciated!

Many thanks,
Matt

Possibly Escape from East Berlin (http://www.imdb.com/title/tt0055962/) or Berlin Tunnel 21 (http://www.imdb.com/title/tt0082059/) or The Tunnel (http://www.imdb.com/title/tt0251447/). If not, approximately what decade was it made?

Many thanks. It was an 80s film so probably Berlin Tunnel 21. Thank you.