A man, 53, has been arrested in Madrid on suspicion of taking upskirt videos of over 550 women and posting much of the content online, BBC News reported.
The 53-year-old Colombian was making videos on a mobile phone he was hiding in his backpack.
The police said that he posted at least 283 videos on porn sites.
Most of the victims are minors.
The police arrested the suspect at the moment when he was going to film another victim.