RIO DE JANEIRO — Irish cyclist Nicolas Roche says he developed a serious case of bacterial pneumonia while in Brazil for the Olympic road race and will miss the Spanish Vuelta.

Roche suggested on Twitter he may have gotten sick from a “bad aircon in Rio,” though he did not say how he knew his illness was caused by air conditioning. He also did not specify whether it was from a unit in the Olympic village, where he stayed with the rest of the Irish team.

“Riding the Vuelta was a big target for me this year and I was looking forward to being part of the team,” Roche said. “The illness couldn’t have come at a worse time, really, and after speaking to the medical staff, it’s pretty clear that I’m not going to be ready in time.”

TRACK AND FIELD: The lone Russian track and field athlete at the Olympics is waiting to hear whether she will be allowed to compete.

Darya Klishina was the only one of 68 Russians cleared to participate in Rio de Janeiro by the IAAF, largely because she has been based outside Russia for the past three years. But the sport’s governing body excluded the long jumper from the Olympics days ago after receiving what it said was new information.

The IAAF has not disclosed that information, but Klishina appealed the decision and her lawyer, Paul Greene, has said the case rests on signs that the former European indoor champion’s drug-testing samples may have been tampered with in Russia.

Greene argued that even if bottles containing Klishina’s samples had been manipulated, it would not be proof that she had done wrong.

Klishina attended Sunday’s hearing in person at the Court of Arbitration for Sport’s temporary base in Rio de Janeiro.

In the wake of four American swimmers, including six-time gold medalist Ryan Lochte, being robbed at gunpoint early Sunday, the Australian Olympic Committee has tightened its security protocols for its athletes, according to ESPN.

Australian athletes will no longer be able to visit Ipanema and Copacabana beaches after nightfall.