A Chinese couple and seven Thais were arrested in Thailand on Thursday charged with violating a law banning surrogacy for foreigners, Thai police said.
The former military junta outlawed the practice in 2015 after a string of scandals in a country that was once a hub for international surrogacy.
Thai police made the arrests in raids on several houses and offices in Bangkok and the central provinces of Patumthani and Sukhothai, police told reporters at a Bangkok press conference.
They found eight surrogate mothers, including one who was eight months pregnant, and also "saved" a 22-day-old baby boy and a four-month-old girl, police said.
They suspect up to 14 more children have already been trafficked to China.
"This is a transnational crime," said Major General Worawat Wattananakhonbanch.
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"They planted the sperm in a neighbouring country, provided antenatal care in Thailand and then the mothers gave birth in China."
Thailand for years hosted a thriving yet largely unregulated international surrogacy industry popular with same-sex couples.
But a string of scandals in 2014 -- including tussles over custody -- spurred the military government to bar foreigners from using Thai surrogates.
One case saw an Australian couple accused of abandoning a baby with Down's syndrome carried by a Thai surrogate while taking his healthy twin sister.
In another high-profile controversy, authorities discovered nine babies in a Bangkok apartment fathered by a Japanese man using Thai surrogate mothers.
Police expanded their investigations into surrogacy since 2017 when a man was arrested for trying to smuggle six vials of sperm into Laos, Police Colonel Mana Kleebsattabutra added.
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