AKIPRESS.COM - The Brazilian authorities have stopped US swimmers Gunnar Bentz and Jack Conger from boarding a flight at Rio de Janeiro airport, the US Olympic Committee has confirmed.

The two men were taken off a plane, bound for the US, for questioning late on Wednesday.

Two teammates - Ryan Lochte and James Feigen - were barred from leaving the country, but Lochte had already left, BBC reported.

Police have queried their accounts of a robbery they reported in Rio on Sunday.

The four swimmers said they had been robbed at gunpoint in a taxi in Rio.

But police say their account of when they arrived at the Olympic village does not square with CCTV recordings.