Judge Keyla Blank “issued warrants for searches and the seizure of the passports for the US swimmers,” a statement from her office said. “With this, they are banned from leaving the country.”
There were unconfirmed Brazilian media reports that Lochte had already left Brazil. Rio police did not respond immediately to requests for comment.
The US Olympic Committee refused to comment on the athletes’ whereabouts but confirmed that Brazilian police were looking for the swimmers.
“Local police arrived at the Olympic Village this a.m. and asked to meet with Ryan Lochte and James Feigen and collect their passports in order to secure further testimony from the athletes,” spokesman Patrick Sandusky said.
“The swim team moved out of the village after their competition ended, so we were not able to make the athletes available.
“Additionally, as part of our standard security protocol, we do not make athlete travel plans public and therefore cannot confirm the athletes’ current location.”
Sandusky said the US team would “continue to cooperate with Brazilian authorities.”
Lochte says that he and three team-mates were held up by muggers posing as police as they left a party in central Rio.
Lochte said he had a gun put to his forehead in the robbery, when the swimmers’ taxi was pulled over by criminals who forced them to lie on the ground and stole money and other items.
“The guy pulled out his gun, he cocked it, put it to my forehead and he said, ‘Get down,'” Lochte said afterwards. “He took our money, he took my wallet -— he left my cell phone, he left my credentials.”
However, Olympic officials have said police are still looking for key witnesses, including the driver of the cab the swimmers said they had been in.
Blank’s office said the judge was probing “possible inconsistencies in the swimmers’ stories”.
These included different accounts of how many assailants there were. Another point raising doubts over the swimmers’ stories was their behavior, caught on security cameras, as they returned to their hotel after the supposed robbery, the judge said.
“It’s noticeable that the victims arrived back physically and mentally unshaken, even joking with each other,” the judge said.