IDF Discovered More Than 100 Smuggling Tunnels In Gaza

http://www.israelnationalnews.com/news.php3?id=114146

'Underground city being dug in Gaza'
http://www.jpost.com/servlet/Satellite?cid=1159193510716&pagename=JPost%2FJPArticle%2FShowFull
 
Gazans building 'underground city': Israeli army chief
http://www.breitbart.com/news/2006/10/24/061024160019.m0ywfr6d.html
 
Halutz: Hundreds of arms-smuggling tunnels being dug in Gaza
http://www.haaretz.com/hasen/spages/778751.html