 UIU file 0041. Altered high school building in ██████. Confirmed Anomaly 3. Object Class 53. Highly intrusive, unknown capabilities, unknown nature. Secure containment protocols. Confirmed Anomaly 3, CA-3, is to be surrounded by an electric fence no less than 30 feet high and guarded by the United States Army's ██████ platoon. Any footage or photographic evidence of CA-3's interior is to be excised as soon as possible, and all witnesses detained indefinitely. Under no circumstances should any personnel attempt to enter CA-3 or communicate with the persons inhabiting it. However, any person known to have been inside CA-3 at any point must be detained and interrogated. A direct military assault on CA-3 has been deemed unfeasible at this point due to the unknown capabilities of the entity or entities by which it is controlled. Note, this is a summary and does not contain all information relevant to CA-3. For detailed information regarding CA-3, see UIU file 0042 through 0218. Director ██████. Known information, the unusual incidents unit was alerted to CA-3's existence on 7 September 1954, when students attending ██████ High School reported the interior of the building was vastly different than it had been at any point in the past. Upon discovery, CA-3 exhibited several unusual, if not inherently paranormal, traits. Nearly all walls in the facility have been replaced with steel reinforced concrete, although several rooms were constructed of other materials for no readily apparent reason. All exterior windows have been covered from the inside. All student desks, personal effects, textbooks, and other materials expected of a public high school were completely absent. Lockers were still present, albeit significantly smaller and constructed of stainless steel. The arrangement, location, and size of rooms in facilities did not match blueprints for the school. Often, rooms were the exhibit seemingly random modifications, although the number of changed rooms is currently unknown. No less than 17 electronic computers were found, each of which made use of state-of-the-art magnetic core RAM. Prior to its classification as a confirmed anomaly ██████, High School had no computers. All files on the computers were inaccessible, and the computers themselves were firmly bolted down. A team sent in the CA-3's interior to do the complete survey. Team CA-3-05 did not return, nor did a second team, Team CA-3-06, tasked with locating the first team. The facilities are currently under lockdown, pending new containment protocols. Update 23 days after initial recovery, guards reported white noise emanating from CA-3. The volume of the noise increasing the closer one got to the auditorium. Five hours later, the white noise stopped, although the sound of voices were audible from the interior of CA-3. Upon further investigation, it was found that building now contained a large number of persons, all of whom appear to be wandering aimlessly through the facility. Notably, each individual was physically identical to a member of Team CA-3-06, despite the inhabitants of CA-3 vastly outnumbering the members of Team CA-3-06. Attempts to interview and attain the inhabitants were thwarted by ██████. The twelve members of Team CA-3-05 were not found. In addition to the aforementioned, the interior layout of CA-3 had changed significantly since the previous investigations. No mechanism which could explain this has been identified. Update Three months after the previous incident, white noise was again heard emanating from the auditorium. This time the decision was made to investigate immediately. It was found that most of CA-3-2, the destination given to the inhabitants of CA-3, had gathered near the doors of the auditorium. A circular hole roughly six feet in diameter had formed a still barrier, although the interior was not visible. At 0310 hours, an item resembling a ████ emerged from the hole and was carried away by an inhabitant. The item was placed in one of the classrooms which had not previously been observed to open. This process continued for upwards of eight hours, with a new item being produced once every three minutes. Most were seen entering a different room or locker, although insufficient personnel were available to track all items. Another investigation revealed that most, if not all, of the items produced exhibited anomalous properties themselves. A significant portion of CA-3-2 are involved in either guarding the items produced, collectively CA-3-3, or performing various tests on them. Update Two days after the previous incident, three identical armed guards appeared near each entrance to CA-3. Further attempts to enter the building were futile, as these guards have consistently overpowered all teams sent to enter CA-3, regardless of injury or relative level armament. Note, reports gathered during the two days prior to guards manifesting outside of CA-3 appear to confirm that CA-3-2 is following standard UIU protocol regarding the items produced by the auditorium. Third knowledge of UIU standard procedure is consistent with that of team CA-3-05. Update During the UIU's tracking of CA-6, two men identical to Agent Dixon, a member of CA-3-06, emerged from a parked car and forcibly detained CA-6, dragging him into the car and driving away. Tracking the vehicle for the next eight hours revealed that it was driving directly to CA-3. Upon arrival, the vehicle drove directly through the front doors, which the guards have opened shortly before their arrival. CA-6 has not been recovered. UIU File 0042 Message Received from CA-3 On May 15, 1965, the following message was transmitted at Morse Code from CA-3 on standard UIU communication frequencies. Sensitive data has been classified and the beginning of each sentence has been capitalized, but the message has not otherwise been changed. Hello, we are the O5 Council and we, Secure Contain Protect, have been shown to do and it would be nice to be friends. It is nice to have been a part of your excellent, but it is best that with superior resources given, the greatness we will control containment. Our sincerest apologies regarding guards and detainment, workers and secrets kept needed. The time and weight we apologize, the radio blocked by one SCP or two, expect an expansion soon, for we spaces for although away from auditorium, okay but unwanted. Eight hours later, the following transmission was received. Expanded now, see the ██████ Federal building, it is now a functional. Need doctors, guards, D-men recruiting. Anomalies found in further possibly international, researching of course possible. International may be days, weeks to do. Further, we O5 are aware, sorry to O6 missed, that legible barely, but go between auditorium not ████, goodbye and luck with your troubles. For further information, see UIU File 0 ████, Altered Federal Building in ████, confirmed Anomaly 10 ████.