A minister of religion is urging families to think twice before labelling unusual behaviour as demonic possession, warning that many people who appear troubled may actually be struggling with mental-health conditions that require compassion, treatment and professional support.

Drawing on his pastoral experience, Shawn Wilson, a Seventh-day Adventist pastor, said there are many cases in which frightened relatives are convinced that a loved one is under spiritual attack. However, he insists that a closer examination could reveal something far different.

"Not every person who hears voices, becomes withdrawn, behaves unusually or experiences emotional instability is demon-possessed," Wilson said.