Iranian TV showed the remains of small drones that were used to attack one of the workshops of the Ministry of Defense in Isfahan. As we can see, the building really didn't receive serious damage, and it was indeed covered with a special mesh to protect against such small drones https://twitter.com/imp_navigator/status/1619754527632277505?s=46&t=KFdlAp1PZjFv-IKVe4OfxQ