Brazil arrested 10 people Thursday, believed to be belonging to ISIS, in connection with a poorly organized plot of terror targeting next month's Olympic games in Rio.
The group described as "absolutely amateur" by Justice Minister Alexandre Moraes were all Brazilian citizens and in contact via messaging apps such as WhatsApp and Telegram.
Federal police are monitoring about 100 people for possible links to terrorist groups, mostly in the porous tri-border region with Paraguay and Argentina, a presidential aide said on Thursday.
Brazilian police and intelligence services have been cooperating with French, German, British, Israeli and U.S. intelligence agencies regarding the arrests, the aide said.