Abandoned buildings that have become a shelter for pests and wrongdoers: what is the guidance regarding them?

Question:
He says: Honorable Shaykh, may Allah grant you success. He says: There are some abandoned lands that were once houses but have collapsed, becoming a shelter for dirt and filth. When asked about the owner of these lands, it was revealed that they are an endowment (waqf) belonging to a certain person. When we informed the person’s family, they said they do not have the money to restore this endowment at the present time. His question is: What is the correct course of action in this matter? And is it permissible to sell them in this situation?

Answer:
As for selling them, that is for the judge to decide. As for if they are a shelter for pests or a shelter for wrongdoers, the municipality demolishes them. It demolishes these buildings that have no benefit and only cause harm. The municipality demolishes them, and their ownership remains with the endowment. Yes, the ownership of the land. Yes.