About 10 outdoor surveillance cameras were installed at an Osaka home where 33-year-old Airi Kakimoto was found dead last week after being confined by her parents for around 15 years allegedly due to mental illness, investigative sources said Wednesday.

Police suspect the parents, who were earlier arrested on charges of abandoning the body of their dead daughter, set up the cameras to monitor activity in the area out of fear that her confinement would be discovered.

The dead woman had apparently been monitored by her parents since she was a teenager. Police said an autopsy showed that the daughter had frozen to death and was in a state of extreme malnutrition, weighing only 19 kg.