An act of insubordination was thwarted at the last minute in the Kfir Brigade's training base on Thursday when commanders discovered a sign reading "Kfir does not expel Jews" drying in the sun, moments before soldiers planned to hang it from a nearby building. The sign was the third prepared by soldiers from the Kfir Brigade. Earlier this week, Prime Minister Binyamin Netanyahu warned that insubordination in the IDF was a threat to all of Israeli society. On Monday, four soldiers hung a banner reading "Nahshon also does not expel" from the roof of a building at their base to protest the razing of two illegal structures near the Negohot settlement. Two of the soldiers were sentenced to 20 and 14 days in the brig, respectively, while two others were sentenced to four-week confinement. Last month, two soldiers from the Shimshon Battalion pulled out a banner reading "Shimshon does not evacuate Homesh" - a reference to the northern Samaria settlement evacuated during the 2005 disengagement - during their swearing-in ceremony at the Western Wall in Jerusalem. Following Thursday's incident, IDF sources admitted that the cases were no longer isolated and possibly represented a new and growing trend within the IDF. "This needs to be dealt with quickly and forcefully before it gets out of control," one officer said. The sign was discovered as a group of pre-military academy students were visiting the Kfir Brigade training base, located near Bekaot in the Jordan Valley. The IDF said it was investigating the incident and would likely discipline the soldiers involved.