It was on the night of Friday that two men sought treatment at an emergency department. Information then emerged that caused the police to be called. Four people were subsequently arrested on suspicion of kidnapping.
Now four men in their 20s and 25s, and one man in their 50s, have been arrested, on probable grounds suspected of kidnapping.
The two vulnerable men are said to have been picked up in a car and beaten in the car and in various places, including in a basement.
One man has left the hospital, it is unclear if the other has.
The men who are now in custody are suspected of the lesser crime of kidnapping. Which, if convicted, means at least six months in prison.
All those involved are already known to the police.
The suspects deny any crime.