Brazilian Grand Prix organisers have been issued with security recommendations by the FIA to implement in 2018 to avoid the issues which plagued this year's race weekend.
The penultimate race of the season had a series of robberies and attacks on F1 personnel take place away from Sao Paulo's Interlagos circuit. Most concerning was the fact that the incidents continued despite local police increasing its presence around the circuit after Mercedes staff members were robbed at gunpoint early in the weekend.
The problematic weekend prompted Pirelli and McLaren to cancel a two-day tyre test planned to take place at the circuit the following week.