Lewis Hamilton rammed the rear of Kimi Raikkonen’s car, knocking the top two drivers in the Formula One standings out of the Canadian Grand Prix on Sunday.

Hamilton, the defending race winner, started on the pole for the second straight year at Circuit Gilles Villeneuve and led until the safety car came out and the leaders pitted on lap 19 of the 70-lap race. That followed Adrian Sutil parking his Force India entry on the grass alongside the track.

Raikkonen, who came into the race trailing Hamilton by three points in the world championship standings, came out ahead of the McLaren driver. The Ferrari driver stopped at a red light at the end of pit road and Hamilton, picking up speed, rammed into Raikkonen’s car, knocking off the rear wing. Nico Rosberg then hit the rear of Hamilton’s car.