In locating and demolishing a hideout belonging to Hamas leader Yahya Sinwarin northern Gaza along with a large tunnel system under it the Israeli Defense Forces (IDF) advanced, as they announced.

The apartment, located on the outskirts of Gaza City, was found by the 14th Reserve Armored Brigade and later searched by the elite Yahalom engineering combat unit, which found a tunnel.

The IDF says it found “numerous findings” in the apartment that indicate it was used by Sinuar as a hideout.

The tunnel shaft is about 20 meters deep and led to a 218-meter-long tunnel with several branches, according to the IDF.

The underground passages had electricity, air filtration systems, plumbing, rest and prayer rooms and other equipment aimed at allowing senior Hamas members to remain hidden for long periods.

The tunnel was later destroyed by combat engineers, the IDF says.