According to the report, it sounds like a bunch of crackheads - They went after the copper.
I just hope a few of the more rare pins weren't damaged... Namely uber-rare The Pinball Circus.
http://www.ktnv.com/Global/story.asp?S=12305878
They will remain closed until all repairs are made. And since it's a non-profit orginization, it could be a while... If you're a pinball fan, please donate.