If the abnormality found in the area are prohibited, such as property damaged. There are traces of intruders etc to tell authorities who have the appropriate permissions to access prohibited areas of such immediately.
If there's something wrong in prohibited areas such as lost property. There are traces of intrusion or to immediately inform the authorities who have access to prohibited areas such immediately.
If you have seen the forbidden area, such as disorder in a lost property. There are traces of the invasion, etc. to notify staff who has the right to enter the forbidden area immediately.