A senior army source familiar with searches carried out in recent days by the elite Yahalom Combat Engineering unit told on Sunday of the arms found in West Bank searches."We found grenades, which are as deadly as industrially produced grenades, homemade explosives, and weapons labs," the source said."We were not surprised. We knew this existed in homes where families live. On the first floor, the family resides, and on the third floor is a weapons production lab," he added.The Yahalom unit has also taken part in searches in caves in the Hebron area, the source stated. "We divided the unit into company-sized battle crews, headed by a company commander. Each commander has been allocated a particular area," he continued. "The whole of the unit is in Judea and Samaria.""We found dozens of weapons storage areas," the source said. The unit also uncovered underground structures, hidden under ordinary household items such as washing machines.