Click to see full-size image On December 16, an engineer unit of the Israeli military approached the U.N. monitored “blue line” and planted an earthquake sensor in the area of Kurum al-Sharqi near the southern Lebanese town of Meiss al-Jabal, according to the Hezbollah media wing. Click to see full-size image Click to see full-size image Earlier, the Israeli military claimed that it had  found a 4th “Hezbollah attack tunnel”  in the framework of Operation Northern Shield. The operation, which  was launched on December 3 , is aimed at discovering and neutralizing any tunnel that penetrates Israel territory. The Lebanese military has stepped up its presence along the blue line since the beginning of operation Northern Shield. The Hezbollah media wing said that the army began installing cameras along in the line in order to monitor the Israeli movements in the region. Click to see full-size image Few days after the beginning of Operation Northern Shield, Israel’s P