The afternoon session of Formula 1 preseason testing was briefly interrupted Friday when a shuttle bus drove on the track. In a bizarre scene, a red flag was waved to halt testing as a white bus drove slowly on a runoff area of the track at Bahrain International Circuit.

Friday was the final day of Formula 1 pre-season testing but some teething problems at the Bahrain International Circuit caused more than one stoppage in bizarre circumstances

Testing ended on Friday afternoon, with Mercedes star George Russell finishing at the top of the standings, with a lap time of 1:29.545. Prior to the action taking place this week, one of the main talking points was Lewis Hamilton's official Ferrari debut after his high-profile move from Mercedes.