On 21 July 2016 , two weeks before the scheduled start of the Olympic Games , Brazilian Federal Police busted an Islamic jihadist terrorist ring plotting to wreak havoc in a manner similar to the 1972 Munich massacre . 10 people suspected to be allied with ISIS were arrested and two more are on the run . Additionally the terror group has been aggressively encouraging lone wolf attacks to target athletes from the UK , US , France suggesting the use of poisons or explosives attached to drones
Munich massacre
Munich massacre
Terrorism in Brazil