The burglary took place in an overnight heist at the 18th-century palace, known as the birthplace of Sir Winston Churchill and a World Heritage Site. Cattelan's sculpture was forcibly ripped from a lavatory where it was installed for the exhibit, according to reports.
“A 35-year-old man, a 34-year-old man and a 36-year-old woman, all from Oxford, were arrested on suspicion of conspiring to commit a burglary [in a building] other than a dwelling. They all remain in police custody,” a spokesman for the Thames Valley police stated.
A 66-year-old man was previously taken into custody, along with another man who was released.
Detectives are still looking for the multimillion-dollar artwork, which is a functioning toilet.