A couple allegedly filmed themselves having sex with their four-year-old daughter before selling the child porn for $70 in Australia.
The man, 29, and woman, 30, who are believed to be cousins, allegedly made the footage in their native Ukraine.
Police footage showed the couple being detained, as well as the seizure of videos, pictures and sex toys.
A tip from Australian police led to a major police operation in Ukraine and the arrest of the unnamed couple.
According to TSN channel in Ukraine, eagle-eyed Australian investigators spotted a bar code in one of the videos where the four-year-old girl was filmed in explicit sex scenes with her parents.
‘The Australians kept pushing their Ukrainian colleagues – (urging them to) search more – because new videos with some unknown little child were repeatedly being uploaded from the same source,’ reported Moskovsky Komsomolets newspaper.
The Ukrainians initially had problems in locating the couple.
One police source in Ukraine branded the couple ‘pure evil’, while a senior officer described them as ‘beasts’.
It is not known if any Australian clients were nabbed downloading the footage.
The couple were selling the videos ‘to Australia and Asia for cryptocurrency,’ said one report.
The couple were eventually found to have moved from Poltovo to Kryvyi Rih, a city in the Dnipropetrovsk region of Ukraine, and they routinely moved every three months.
In police footage, the man was quizzed by police moments after they were raided last week.
The woman hugged her daughter on the bed in their flat in Kryvyi Rih.
The girl was later shown being led away by a paramedic to an ambulance to undergo hospital checks.
She has been taken into care and has been sent to a rehabilitation centre in Poltova.
The parents are being held in detention for two months pending further investigations. A trial is expected.
Lawyer Ekaterina Malykhina said the girl was distressed.
‘She was in a bad way, she was lost, she did not talk to anybody,’ she said.
‘Now she is talking to children, she made some friends and trusts them.
Reports say the girl will never be returned to her parents. She may be placed into a foster family.
The couple face up to 12 years in jail if convicted.