"JERUSALEM—Even before it finished defusing the tunnel threat from the Gaza Strip Monday with the detonation of the last of 31 Hamas attack tunnels, the Israeli army began shifting its attention to the possibility of a similar threat from Hezbollah along the border with Lebanon. Residents of communities on the northern border have periodically reported hearing the sound of underground digging over the years..."
http://freebeacon.com/national-security/israel-concerned-hezbollah-building-terror-tunnels/
A few airstrikes and they’re history.
As for the tunnels along Israel’s northern border - give Israeli citizens flam throwers to use invaders trying to exit the tunnels.