IDF officials uncovered an attack tunnel on Monday that opened into Israeli territory near the Israeli community Kibbutz Nir Oz. A similar tunnel was used in the 2006 attack in which Palestinians killed two Israeli soldiers and kidnapped a third Israeli soldier, Gilad Shalit. Another attack through a tunnel could be expected to severely undermine regional stability, especially if the attack included mass casualties and kidnappings, which the discovered tunnel seems to have been built to enable. The discovery comes as the rival Palestinian factions in control of the Gaza Strip and the West Bank, Hamas and Fatah respectively, are seeking reconciliation under Egyptian auspices. It promises to call into question the intentions of the Hamas negotiators, who would be expected to accept previous Palestinian agreements with Israel in the context of a unity government.