UK and US authorities investigating a "dark web" child pornography site run from South Korea on Wednesday announced the arrest of 337 suspects in 38 countries.
Britain's National Crime Agency (NCA) said the "Welcome to Video" site contained 250,000 videos that were downloaded a million times by users across the world.
"The website monetised the sexual abuse of children and was one of the first to offer sickening videos for sale using the cryptocurrency bitcoin," the NCA said in a statement.
"The arrests were made in 38 countries including the UK, Ireland, America, South Korea, Germany, Spain, Saudi Arabia, the United Arab Emirates, the Czech Republic and Canada."
One man "was jailed for 22 years for raping a five-year-old boy and appearing on Welcome To Video sexually abusing a three-year-old girl."
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