A Queensland mother has been left in a state of shock after discovering a stranger had been living in her roof.

Monica Green from Norman Gardens in Rockhampton said she had noticed things were out of place in her home in recent months, but had dismissed her own concerns.

However, on Monday, she arrived home early from a doctor’s appointment and discovered the house to be a mess.

The air conditioner was turned on, the back door was left open, and a half cooked meal of chicken nuggets was left on the kitchen counter, prompting Ms Green to immediately call the police.

The police had discovered an attic door, which had been left askew.

“I felt like it was something out of a horror film,” she said.

“Why was he in the roof? What was his intentions? Was he here to harm us? Was he here to steal one of my kids?

“I’m meant to be the one that protects them and I feel like I’ve failed.”

Before she was made aware of the intruder, she had noticed food had gone missing, and her security camera had been disabled.

Jason Milner from Queensland Police said the incident was “certainly unique”.

“It’s not a usual break and enter occurrence”.

“I felt violated. I felt like my personal space had been invaded. I felt shocked, terrified, scared,” Ms Green told the Courier Mail.

She believes they initially gained entry to her home by stealing her car keys.

Queensland Police are investigating the incident.

This article originally appeared on Over60.