Mirror Hanging Woes - Metal in Wall?

[sheldorbaz1nga]

Hi all,

I am trying in vain to hang a mirror above my fireplace in the living room. However when I tried drilling into the wall I discovered there was some metal in the wall - essentially preventing me from drilling any further.

Here's a picture;

As you can see it's rather shiny and copper-coloured and sitting about 10mm from the wall surface. I tried a second hole above and whatever it is it's running vertically.

This is above a fireplace. The room above is the master bedroom so as far as I know there shouldn't be any pipes running down there, should there?

I'm confused. Can anyone shed any light on this?

 

[foxhole]

If copper then will probably be either water or worse gas. Stop drilling.Do you have access to under floor, easiest to check there to identify.