Image copyright Reuters Image caption CNN launched its investigation after meeting victims of the scam
Thailand police have issued arrest warrants against five people in connection with a medical gloves scam.
Eight suspects were initially held in connection with the scam, which ran from 2008 until this year, after CNN carried an investigation.
Thai police said four of the suspects – which include a woman – have now been arrested.
BBC News understands the investigation, which has now been passed to the US authorities, could take up to two years.
People in Thailand suffered severe injuries when they swallowed medical gloves that were subsequently removed by paramedics, according to the investigation carried out by the US cable network earlier this year.
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Thai officials tried to shut down CNN’s investigation into the operation, but a judge ruled that it was allowed to continue.
CNN reported that paramedics in Thailand began picking up raw meat from an overcrowded working camp in 2013.
Doctors provided gloves to the paramedics, who typically helped people in need of emergency treatment.
Watch the CNN investigation