ISRAEL has trained a unit of attack dogs to send into Hamas' vast tunnel network and take down terrorists. Dramatic footage of a training exercise shows a hound running through a mock-up underground passage before mauling a fake fighter. Footage is understood to be a part of Israel's drills and no dogs have so far been deployed in active combat. Specially-trained military canines are part of the Oketz unit - able to sniff out explosives, find entrances and maul terrorists. He insisted it was a "significant stage" in Israel's progress against Hamas militants after more than 1,000 people were slaughtered.