The final pre-season testing session was disrupted by a bizarre incident caused by a much slower mode of transport than a Formula 1 car. F1 is at the Bahrain International Circuit this week as teams build up to the new season by trying to get as many laps as possible in with their new machinery.

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.

Formula 1 testing on Day 3 came to an abrupt stop due to an unusual incident at the Bahrain International Circuit. On the main straight, where the chequered flag is waved, a pane of glass was discovered to have shattered,