Investigators said they seized about 350 human skull fragments from the suspects, the Bangkok Post reported Friday.
Arrested were the 47-year-old abbot of a temple in Khon Kaen province in northeastern Thailand, a 39-year-old monk, a 13-year-old novice monk and two accomplices, 39, and 28, police said.
In one case, the suspects were accused of digging up a man's body in the temple's graveyard, stealing the skull and breaking it into fragments, which they decorated as love talismans that were sold in Hong Kong for between $32 and $97.
The monks, who admitted to taking three skulls, said they used the money to buy drugs, police said.
Beautician charged with giving client fatal silicone butt injection
LGBT community has 'bullied the American people': Bachmann