The Israeli army has discovered a mile long tunnel running from the Gaza Strip into Israel where government officials say it’s likely terrorists used the tunnel for attacks on civilians.

Israel has shut down all transfers of construction material to Gaza while Hamas is claiming that Israel is “exaggerating” the situation.

While Hamas’ political leaders were saying the claim by Israel was just an attempt to “justify the blockade” of the Gaza Strip, the spokesman for the military wing of Hamas said “the minds which manage to dig the tunnel can dig dozens more” implying that the tunnel was a military asset.

The Israeli military found explosives inside the tunnel that was about 60 feet deep. Experts said it would likely have taken a month to dig the tunnel.

Hamas has previously used tunnels as a tool in attacking Israeli civilians. For example, a tunnel was used in the kidnapping of Israeli soldier Gilad Shalit who was kept prisoner in Gaza for over five years.