Brazilian Police have arrested 10 people suspected of plotting a terrorist attack at the 2016 Rio Olympics.
The group, who pledged alliance to ISIS on social media, communicated through online chat service WhatsApp where they discussed using weapons and guerrilla tactics in a possible attack.
Justice Minister Alexandre de Moraes said the group, who were all Brazilian citizens, were “absolutely amateur”.
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“A few days ago they said they should start practicing martial arts, for example,” he said.
Authorities are on the hunt for another two suspects, believed to be linked to the group.
The arrests come following rising concerns about the safety at the Rio Olympics next month.
Last week, the Federal government announced an extra $24m would be used towards security at the games.