Per 
SCP-002 viewed from a security camera
Item #: SCP-XXXX
Object Class: Euclid
Special Containment Procedures: Due to SCP-XXXX's anomalous properties complete containment is currently impossible. The area surrounding SCP-XXXX is completely isolated from the public and heavily guarded by armed forces with appropriate equipment. Any individual attempting to enter the isolated area will be removed by force if necessary.
SCP-SCP-XXXX should be entered for research purposes only. While research is being conducted, no more than 3 individuals may enter it. Any person entering SCP-XXXX must wear noise-canceling headphones and a hazmat suit. When a radiation spike is detected, personnel should evacuate SCP-XXXX as soon as possible. SCP-XXXX is to be inspected via surveillance cameras every 24 hours to check for any changes. If an individual is affected by SCP-XXXX (now referred to as SCP-XXXX-2) they should be neutralized as soon as possible.
Description: SCP-XXXX is a three-story house located in an isolated town in █████, Croatia. The origins of SCP-XXXX and it's anomalous properties are unclear, but it is speculated that the house was built around 1870 and started showing it's anomalous properties around a century later. There were no known owners of the house before it was classified as SCP-XXXX.
made from stone and concrete with working electricity and drinkable water, it is approximately 10 meters in height and 8 meters in length. It is unknown when it was built or who built it. The house has a sign on the left of its door with the word ██████ and the number 51. Past explorations have shown that there are sentient bipedal entities living in SCP-002 (SCP-002-1 (see below)). SCP-████ emits a high-frequency sound that makes anyone that is hearing it enter the house and vanish completely. When entering it, all personnel must wear sound protective gear and a hazmat suit. SCP-002 has 2 floors and a ground floor, the ground floor being two rooms: a kitchen and a living room with a sofa, a piano and a dining table, the 1st floor being 2 empty rooms and the 2nd-floor being the attic. Studies have shown that the surface of SCP-002 is unbreakable because of unknown reasons.
SCP-002-1 instance inspecting one of the cameras
Item #: SCP-002-1
SCP-002-1 are sentient bipedal entities from unknown origin, approximately 2 meters tall. They show docile behavior unless you attempt to interact with them up close. When an interaction is made with SCP-002-1, they become extremely hostile and run towards the victim and attempt to destroy it, usually succeeding at doing so. They can also speak English and Croatian, but they speak it in a very weird way.
These are the first attempts to communicate with SCP-002-1 instances:
Document 002-1: log_15: 1st attempt to communicate with an SCP-002-1 instance, Recorded via a microphone placed in SCP-002
Dr. ██████: Can you understand me?
SCP-002-2 instance: (growling and grunting)
Dr. ██████: (louder) Can you understand me?
SCP-002-1 instance: (growling) Yes…Who is spoken with me?
Dr. ██████: This is Dr. ██████, I'm going to ask you some questions, is that OK with you?
SCP-002-1 instance: (muttering)
Dr. ██████: Can you repeat that please?
SCP-002-1 instance: (screaming) NO!
Dr. ██████: Hey, relax, I'm here to help. Now, can I ask you some questions?
SCP-002-1 instance: (screaming) LEAVE ME ALONE! (microphone static)
Dr. ██████: (to Dr. ███) It broke the microphone.
Dr. ███: (to Dr. ██████) We should stop now, let's try this again in a few weeks.
End of Log
Document 002-1: log_18 2nd attempt to communicate with an SCP-001-1 instance, this time a different one
Dr. ██████: Hello? Can you hear me?
SCP-002-1 instance: Who is these voice?
Dr. ██████: This is Dr. ██████, Can I ask you a few questions?
SCP-002-1 instance: (in Croatian) ████ se!
Dr. ██████: Pardon?
Dr. ███: He told you to go ████ yourself.
Dr. ██████: Oh, well that's just rude!
SCP-002-1 instance: This creature thing understand me?
Dr. ██████: Yes, can he ask you a few questions?
SCP-002-1 instance: Yes, može.
Dr. ███: Question one: Who/What creates the high-frequency sound that lures people into SCP-001?
SCP-002-1 instance: Our creator, ██Š█Č██ĆĆ█Ž██. He be everywhere.
Dr. ███: Why do you lure people in the house?
SCP-002-1 instance: To create army. We fight in "The Great War" of 2187.
Dr. ███: Do you know SCP-427 by any chance?
SCP-002-1 instance: (starts crying)
Dr. ███: Are you OK?
SCP-002-1 instance: (still crying) Terrible…things. (walking away crying)
Dr. ███: (long silence) Well, we made some progress.
Dr. ███: How do you turn this thing off?
Dr. ███: Ah! There we go.
End of Log
Addendum 1: SCP-001-First discovery
September 8, 1996, When SCP-427 Breach at Site ██ happened, 45 MTF units reported seeing the SCP running towards an empty, broken down village/town in ███████. The SCP then screamed in terror and ran into a forest next to the town (it was later captured by electrocuting it and flying it into its new container). The MTF units were then asked to go into the town and explore it. They reported hearing a high pitched noise describing it as "calming" and "inviting" coming from a weird-looking house. Their microphones stopped working after that.
Addendum 2: SCP-001-First exploration
June 18, 2009, 3 Class D personnel entered the house (now called SCP-002) while equipped with sound protective headphones with speakers so they can hear each other, 2 inch microphones, a hazmat suit and security cameras. Their tasks were to collect data and place security cameras in and around the house.
Document 002: log_09: 1st exploration
D-1375: OK, we entered the house, what now?
Dr. ███: Explore it a bit more and tell me what you see.
D-1375: OK.
D-1528: (screaming) OH GOD!
D-1375: Hey…D-1528 just vanished.
Dr. ███: OK, um…(stuttering)…Keep exploring it.
D-1375: OK, so, I'm on the ground floor and there's a kitchen and a living room, looks like there are two more floors.
Dr. ███: Can you please go to the first floor? D-1153 will stay on the ground floor.D-1375: Sure.
(D-1375 climbing up)
Dr. ███: So?
D-1375: There are just two empty rooms and a- (sudden stop) there's something in the room on the right
Dr. ███: (surprised) Wait, what?
D-1153: Yeah, I can also see one in the living room.
Dr. ███: Can you describe them to me?
D-1375: It's about two meters tall, it has big, yellow eyes, it doesn't have hands, it's green with black squares and there are some sort of tentacles under it's head.
D-1153: Mine looks the same, except it's orange.
Dr. ███: Jesus Christ! A-Are they attacking you?
D-1375: No, t-they seem docile.
Dr. ███: Can you try to approach them?
D-1375: (after a long pause) OK.
(D-1375 approaching the entity SCP-002-1)
(screaming and growling)
D-1375: Oh shit! (microphone static)
D-1153: (screaming in the background) Oh God! It decapitated him!
Dr. ███: Oh God…D-1153, please place a camera on the ground floor and exit the house immediately. There are three lieutenants waiting for you outside the house.
(D-1153 placing the camera and exiting)
D-1153: OK, I exited it, when can I take the headphones off?
Dr. ███: When you are out of the town. (to Dr. ███████) We made great progress.
End of log
