Facility Manager Raghu, Machine Operator Williams and helper Ashok have been arrested, police said.
The victim, working as an airhostess in a private airline and a native of Nagaland, suffered head injuries when she was thrown off while taking a ride on 'Octopus Ride,' (a machine in which cars attached to five to eight arms pinned to a central axis spin and move up and down in random),police said.
She was pronounced dead at a nearby private hospital where she was rushed, sources said.
The cause of death is being probed.