Trouble flared at the Maracana on Wednesday as Chile fans stormed the stadium's media centre prior to the FIFA World Cup clash with Spain.
Ahead of kick-off in the Group B clash in Rio, a large group of fans broke down a barrier outside the stadium and burst through checkpoints into the media area.
Temporary walls were brought down and glass doors smashed in the chaos before several fans were eventually led away by police.
More supporters were held by officials inside the press centre as members of the world's media watched on, and FIFA confirmed that 85 people were being held by local police.
The police themselves later confirmed that those 85 would be required to leave the country within 72 hours or face deportation.
A statement from the governing body read: "Ahead of the Spain-Chile match at the Maracana, a group of individuals without tickets violently forced entry into the stadium.
"They broke fences and overran security before being contained by security. They did not make it to the seats.
"The situation was brought under control quickly and at least 85 intruders were detained by the military police of Rio.
"The organisers of the World Cup condemn these acts of violence. We'll communicate further info and measures to be taken in due course."
The incident will likely raise unwanted questions for FIFA and the competition's organising committee as to security at the World Cup venues.
Protests at the amount of money spent on the competition had already marred the build-up and the tournament itself, with many Brazilians unhappy at the lack of investment in local infrastructure.
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