Scientists have been left baffled by a "haunted" playground swing, in Firmat, Argentina, that rocks backwards and forwards by itself. Locals claim one seat swings nonstop for ten days before stopping dead, while other swings remain still.

Parents and children are convinced that a ghost is to blame for the phenomenon. They reported the swing to police after it began moving four months ago, but Police officers had to admit they were stumped and called in physics professors but they too failed to find a logical explanation. Teacher Maria de Silva Agustina said: "One child called it the Blair Witch Playground. We believe it is haunted." Physics professors called in to examine the phenomenon have now ruled out magnetic and electrical fields, and winds - and called in ghost hunters.