Investigations are underway after a deceased 24-year-old man was discovered, and two other people were found with injuries at Glen Eden on Sunday.
Emergency services attended the Blaxland Court address shortly before 1pm on 17th April to do a welfare check.
Gladstone detectives have declared a crime scene and the investigations have commenced into the cause of the incident.
The two injured survivors were a 50-year-old woman and a 20-year-old man. They are recovering in hospital.
The three people are all known to each other, and police are not seeking anybody else in relation to the incident at this time.