The IDF is delaying the replacement of its top Gaza commander, an Israeli military official said Thursday. The move comes as fighting threatens an increasingly shaky 5-month-old truce between Israel and Hamas in the Gaza Strip. The truce began unraveling last week, when Israeli forces entered Gaza to destroy a terrorists' tunnel. Seven Palestinian gunmen died in ensuing clashes. The fighting unleashed a wave of rocket and mortar attacks from Gaza at Israeli border towns and military patrols. On Wednesday, four terrorists died in clashes. Brig.-Gen. Moshe Tamir was scheduled to be replaced Friday, but a military official said that because of the tension on the border, his term has been extended till further notice. He spoke on condition of anonymity as no official announcement has been made.