A UN investigation showed Wednesday that two tunnels allegedly dug by the Lebanese militia group Hezbollah snaked under the Israel side of the tense border — but the probe did not find any exits located there. It called the findings a “serious violation” of a UN resolution that ended the brutal 2006 war between Israel and Lebanon, which was triggered by a Hezbollah raid on the same border. “A thorough investigation to establish the trajectories and points of origin of the identified tunnels is a complex task,” said Jean-Pierre Lacroix, the deputy head of UN peacekeeping operations.