South Africa have cancelled a training session after three Springbok players tested positive for COVID-19 on the eve on the British and Irish Lions' departure to the country for a three-Test series next month.
First-choice scrum half Herschel Jantjies, prop Vincent Koch and wing S'bu Nkosi were named as the three players but South Africa's director of rugby Rassie Erasmus said he did not think it was a serious matter and it would not impact on two warm-up tests against Georgia or on the Lions tour.
They will be the Springboks' first Tests since they lifted the Rugby World Cup in Japan in November 2019 after the coronavirus pandemic kept them out of action in 2020.
"I don't think (the positive tests) is a big cause for concern but we want to keep everybody as safe as possible," Erasmus told a news conference.
"We have followed strict proposals and everyone is isolated at the moment."
All South African players arriving at their Johannesburg hotel on Saturday underwent coronavirus testing and were not allowed into their rooms unless they had tested negative.
A PCR test returned the three positives cases and they were being re-tested. Erasmus said he hoped the re-testing would turn out negative with none of the trio showing any symptoms.
"If they are positive it is a case of being unlucky, not anything that they might have done wrong."
Jantjies and Nkosi had been training with the Boks over the last weeks in Bloemfontein while Koch arrived at the weekend from English club Saracens.
The Springboks are in a bio-secure hotel where they are the only residents. They play two tests against Georgia on July 2 and 9.
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The Lions leave for South Africa on Sunday for their eight-game tour, starting on Saturday against South Africa's Johannesburg-based Lions franchise.
The three test matches against the Boks will be played on consecutive Saturdays from July 24.
South Africa is in the grip of a third wave of COVID-19 infections, led by the Delta variant that was first discovered in India, with president Cyril Ramaphosa scheduled to address the country later on Sunday when he is expected to announce tighter lockdown regulations.