Rio de Janeiro: Two Australian swimmers have been disciplined after a night out in Copacabana that saw one forced at gunpoint to go to an ATM and robbed of $1000 and both of them denied a spot at the Games closing ceremony.

Swimmers Josh Palmer and gold medallist Emma McKeon were grounded after Palmer was left disorientated in Copacabana, and McKeon stayed with a friend overnight without notifying team management.

From left: Australia's Emma McKeon, Brittany Elmslie, Cate Campbell and Bronte Campbell take gold in the women's 4x100m freestyle relay in Rio. Credit:AP

The pair had been with a group of Australian swimmers at a Copacabana nightclub but chose not to accompany their teammates back to the athletes' village. It is understood they were still in the nightclub at 4am on Wednesday morning.

A statement issued on Thursday morning, Rio time, by the AOC boss Kitty Chiller said McKeon, 22, and Palmer, 25, must now remain in the village between 8pm and 8am and only travel to sporting events in official Rio 2016 transport.