Two Australian rowing coaches have been robbed at knifepoint in Rio de Janeiro, prompting calls for tougher security at the Olympic Games.
The coaches were robbed on Friday at Ipanema Beach, just before the opening ceremony, News Corp has reported.
Other reports said the coaches were violently assaulted during the incident after being approached by two teenage boys, including one who pulled out a knife and demanded money.
One of the coaches was grabbed around the throat before the attackers stole credit cards, mobile phones and an Australian team blazer, Nine News reported.
"They did the right thing and they didn't resist, and that's what's important," Australian Olympic Committee spokesman Mike Tancred told News Corp.
"But they weren't in a group, and our message is that we want them to not go out in pairs because it is just not safe."
Mr Tancred said organisers needed to do more to improve security.
Following the incident team members based around Ipanema have been instructed not to walk after 6pm, wear casual clothes and keep their accreditation hidden.