Two members of the Balearic Islands luxury watch theft gang were arrested and sent to prison in the UK.
The Policia Nacional has detained and imprisoned a third man in Catalunya.
The identities or ages have not been disclosed.
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The thieves snatched four high-end watches worth a total of €525,000 from their owners in Mallorca and Ibiza last August.
The Policia Nacional stated that the thieves used a high level of coordination and organisation in carrying out the thefts.
The fake identities were used to rent cars to travel the island.
The trio watched potential victims on the street. One of them then carried out the violent snatching before fleeing into the getaway vehicle.
In less than an hours time, two men were robbed and attacked in Mallorca on August 22, 2018.
One of the victims resisted but was unable to prevent his watch from being taken with the total value of the thefts being €95,000.
The thieves returned to Ibiza, this time for three days. They hired another car with fake documents.
Two more watches were stolen, with a total value of €430,000.
The Policia Nacional initiated a probe to find and identify the thieves.
This included the issuance of European Arrest Warrants for two individuals detained in the United Kingdom.
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