Police in northern Greece say a 12-year-old girl has been arrested along with three of her relatives after selling her 10-week-old baby son for 12,500 euros ($A15,500) to undercover officers posing as adoptive parents.
A police statement said on Monday the girl, her 44-year-old aunt and her aunt's parents, aged 65 and 71, were all arrested on illegal adoption charges.
The 12-year-old was expected to be released from custody after being interviewed by a public prosecutor.
The incident took place in Xrysoupoli, a town about 700km northeast of Athens, after police acted on a tip and used marked banknotes for the transaction.
The baby was hospitalised for observation. Source