The Olympic diving pool turned a mysterious shade of green on Tuesday and has not changed back to blue on Wednesday. The world swimming governing body FINA said the pool is safe.
South Korean swimming ace Park Tae-hwan will train in Japan while he is serving a doping ban.
Officials in Rio de Janeiro on Wednesday rebuffed claims from swimming's world governing body FINA that 2016 Olympic aquatic events are being treated with "disrespect".
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