UPDATE: Ryan Lochte confirmed to NBC News he was robbed, along with three other swimmers.
Ryan Lochte's mother reportedly told Fox Sports Australia her son was robbed at a Rio party.
But the International Olympic Committee called her story "absolutely not true."
BREAKING: US Olympic officials say Ryan Lochte, 3 other US swimmers robbed by people posing as armed police.— The Associated Press (@AP) August 14, 2016
U.S. Olympic officials later agreed with Lochte's story.
According to Fox Sports, Lochte was at a party with Brazilian swimmer Thiago Pereira, and is now safe. He reportedly called his mom immediately afterward.
Illeana Lochte told USA Today there were "a few" robbers who approached Lochte and at least one U.S. teammate as their cab stopped for gas.
Lochte's wallet was stolen, but he and his teammates were not hurt. He said the robbers posed as police officers.
Lochte won one gold with the U.S. so far, as part of the 4x200-meter freestyle relay. His last event was on Thursday.
Rio has struggled with crime leading up to the games, including a severed foot washing up near the volleyball court and cocaine baggies with fake Olympic branding, but reports of crime during the games themselves have been relatively few.
For more Olympic coverage from Circa, check out the five weirdest events that used to be part of the games.