Brazil Olympics: USA swimmer Ryan Lochte and three other athletes robbed in Rio
According to the US Olympic Committee (USOC)statement, Lochte, Gunnar Bentz, Jack Conger and Jimmy Feigen were stopped by people posing as armed police. The robbers wanted money and other personal belongings.
At first the International Olympic Committee (IOC) tried to cover reports about the robbery, but the US committee later confirmed it had happened. Lochte wrote on social media that he and the other athletes were alright, and thanked all those who had given him support.
The athletes went to a party at the French Olympic team's hospitality house when their cab was blocked on the way back to the athletes' house. The story came up when Lochte's mother, Ileana, who explained to USA Today her son was fine but shocked by the robbery.
Lochte swam in two events at the Rio Games, winning gold in the 4x200m freestyle relay.
The Brazilian government has deployed more than 80,000 law enforcement officers to patrol Rio during the games.
Other stories of security breach in Rio:
In the build-up to the games, three members of the Spanish Olympics sailing team and an Australian paralympian were robbed at gunpoint.
The Australian Olympic Committee claimed that two rowing coaches were robbed at knifepoint on Ipanema beach on 5 August.
Security co-ordinator for the opening ceremony was targeted in attempted robbery as he departed the Maracana stadium the morning after on 6 August. His guards opened fire on the robbers, killing one of them.
On 6 August thePortuguese education minister was robbed in Ipanema as he came back from a cycling event.
Russian swimmer Evgeny Korotyshkin posted a photo on Instagram of two armed men who robbed him near Ipanema on 11 August - the photo is currently removed.