They tried to buy a weapon online. Earlier this week, a jihadi channel on the messaging app Telegram called for attacks against the games and detailed targets and methods, according to the SITE Intelligence Group. Western athletes were between suggested targets. T be better prepared, Brazilian forces have been working with French SWAT teams to simulate attack scenarios. New security measures were adopted after the attack in Nice. In addition to the deployment of 85,000 police officers and soldiers, double the force used at the London Olympics, the new measures will include extra checkpoints, barricades, road blocks and traffic restrictions. Brazilian authorities have denied Olympic accreditation to four people believed to have links to terrorism. Security officials have also recommended another 11,000 people be rejected, too. The military would begin patrolling sports venues from 24 July.