An Israeli army force crossed the technical fence border near the Lebanese village of Rumaish at dawn on Wednesday, this being the third transgression in less than 24 hours.A security source told Petra’s reporter in Beirut that an Israeli infantry force crossed the technical fence near the Blue Line, the de facto Lebanon-Israel border established by the U.N, and carried out field work it started on Tuesday.The move prompted the Lebanese army and the United Nations Interim Force In in Lebanon (UNIFIL_ to stay in a state of alert in anticipation of further developments, the source said, adding that the Israeli army informed the UNIFIL that it would carry out the field work necessary for military purposes.