Three villagers and a 10-month-old infant in Shandong province were illegally detained by local birth control authorities after they failed to pay a 140,000 yuan (HK$177,000) fine for violating family planning rules, mainland media reported. The illegal detention was brought to public attention earlier this week after a video was posted online, showing the detainees, locked in a house behind two gates, being freed by police. The public security bureau in Shandong's Junan county, Linyi city, confirmed the video was genuine and that police freed them on November 25 after receiving a report on the incident, Shanghai-based news website Thepaper.cn reported. Authorities have launched an investigation and local officials involved in the case have been suspended, according to a statement from the district propaganda office. On the mainland, family planning authorities can level fines against violators but are not empowered to detain them. According to the report, the baby is the third child of Zhang Yongling, 39. Her husband Liu Tao was dragged into a minivan by about seven employees from the family planning office when he left home early on November 18, and they took him to the Xianghe Inn in Xihonggou village. Another villager, Tang Jingyin, was also detained in the same place, it said. The officials then contacted Zhang and told her to bring a change of clothing to her husband. When she arrived on November 22, they detained her and released the husband. Two days later he sent to infant to the mother to be breastfed. The video showed a woman, said to be the wife of the owner of the inn, opening two gates - the second gate with three locks on it - and entering the courtyard accompanied by four policemen. "Thank you, thank you. [The baby is] 10 months old. They asked for 140,000 yuan," sobbed the mother, carrying the child. The mainland eased its one-child policy earlier this year, but rural couples have long been allowed to have a second child if the first born was a girl. Liu spoke to the Huashang Daily , which quoted him as saying: "Our town's policy is that if your first child is a girl, you can apply … to have a second child. If your first child is a boy, then the second child is outside the policy and you will have to pay 70,000 yuan. The one-off payment for a third child is 120,000 yuan, and the instalment payment is 140,000 yuan," Liu told the Daily . "If you can't pay the fine within a year, you will then need to pay 200,000 yuan." Tang, the other detainee, said he also failed to pay a 140,000 yuan fine for his third child.