Five players from Spain's top two leagues have tested positive for coronavirus, La Liga confirmed on Sunday.
Players in Spain's top-flight and Segunda division were allowed to carry out individual work at training grounds last week.
The move was the beginning of a staggered training programme, with the aim to restart competitive games in the middle of June.
La Liga insist identifying infected players through positive tests are part of that plan.
The five players, who have not been officially named, will now be quarantined at home and tested again "in the next few days".
They will be allowed to rejoin their club's training programme only after obtaining two consecutive negative test results.
A La Liga statement read: "Among La Liga Santander and La Liga SmartBank (Segunda) clubs, five positive cases were detected in players, all of them asymptomatic and in the final phase of the disease."
"In this way, we guarantee everyone's safety when returning to work according to the occupational risk regulations."
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