Israeli military shoots dead 17-year-old Palestinian The military confirmed opening fire at protesters, saying some had cut through a section of the barrier fence. Military spokesman Capt Eytan Buchman said troops "initiated standard rules of engagement, which included live fire." An investigation into the shooting has been ordered, and Capt Buchman said he could not comment further on the open-fire order. The gunmen have links to Mahmoud Abbas' Fatah movement, and their recent protests have drawn attention to growing discontent with Abbas' rule. Abbas governs the West Bank, while Hamas militants have a rival government in the Gaza Strip. The Israeli military said on Monday that it discovered a tunnel Hamas militants burrowed from the Palestinian coastal territory of Gaza at least 300 feet deep into Israeli territory. Military spokesman Lt. Col. Avital Leibovich said the tunnel was dug in the direction of two Israeli communities, and the assumption was that militants had hoped to use it to stage an attack on civilians. No Gaza militant group has claimed responsibility for digging the tunnel. Leibovich said it was discovered in the course of a routine military patrol, but would offer no specifics. The military has discovered other such tunnels in the past. Leibovich said it was not clear whether the tunnel was dug before or after Israel's November offensive against Gaza militants. In 2006, Palestinian militants burrowed under the border to an Israeli army base, killed two soldiers and captured a third, Sgt. Gilad Schalit. After being held captive in Gaza for more than five years, he was exchanged for more than 1,000 Palestinian prisoners in 2011. In another incident, Israeli police arrested 20 Palestinian activists when they tried to reach a protest tent encampment where demonstrators were evicted a few days earlier, police spokesman Micky Rosenfeld said.