The International Olympic Committee (IOC) said Monday that it accepted Iranian swimmer Mohammad Alirezaei did not swim in his 100-metre breaststroke heat due to sickness and not because Israel's Tom Beeri was also competing, dpa reported.
"The athlete has withdrawn because of sickness. He confirmed this in writing to his federation," IOC director of communications, Giselle Davies, told a press conference.
"We've also spoken to the (Iranian) National Olympic Committee. They have underlined to us that all athletes compete here in the right spirit, against athletes of any nationality. We have taken both the athlete and the National Olympic Committee at their word on this."
There has been no meeting of athletes from Iran and Israel since the 1979 Islamic revolution and Iranian athletes have always rejected competing alongside Israelis as a sign of solidarity with the Palestinians and therefore faced disqualification on several occasions in international sport.
During the 2004 Athens Olympics, Iran's judo world champion Arash Miresmaeili, one of the country's biggest hopes for a gold medal, refused to compete against Ehud Vaks of Israel in the first round.
However, the Iranian official in charge of the swimming team in Beijing, Wahid Muradi, said that Alirezaei had suddenly been taken ill with a stomach bug and had been hospitalized.