(JNS.org) The Israel Defense Forces (IDF) Combat Engineering Corps uncovered numerous secret underground compartments in Palestinian homes during the course of the ongoing search for three Israeli teens kidnapped in Judea and Samaria.

Engineering Corps special forces discovered the secret compartments in various locations, in one case under a washing machine. Israeli troops have also uncovered more than a dozen explosives laboratories, the IDF said.

“We were not surprised, but the number [we discovered] is not what you see every day,” an officer from the unit said, reported Israel Hayom. “Still, on the first floor lives a family and on the third floor there is an explosives lab.”