This is the belief of many people who say that this plane disappeared in the Bermuda Triangle.
But the plane was no where near the Triangle. Now the conspiracy theorists claim its actually a Bermuda quadrilateral at work here.
There has been no trace of the plane's debris so far. Where did those 200+ people disappear. Kidnapped by aliens or the victims of old machinery belonging to the Atlanteans which still continues to operate from the depths of the ocean. Or were they all killed when the plane crashed into the river. 1000's of theories but no answers as of now.