This is reported by The Local.
Police found the masks in cardboard boxes on the ground floor and in a warehouse of a hotel in Leganes on the southern outskirts of Madrid.
The boxes were ready for transport and marked as containing KN95 and FFP2 masks with a high degree of protection.
In addition, the police found a printer capable of printing masks with the so-called CE marking, which indicates compliance with European standards.
“The seized material leads investigators to believe that the unapproved masks were subjected to a seal (CE marking) so that they could be marketed as certified masks,” the statement said.
Police raided the hotel after being notified of a gathering of 48 young people who had breached restrictions on the number of people allowed to meet.
Officers arrested the hotel manager on suspicion of forgery.