Briton Lewis Hamilton was stripped of a dramatic victory in the Belgian Grand Prix after stewards handed him a 25-second post-race penalty.
The McLaren driver was demoted to third place behind Ferrari's Felipe Massa and BMW Sauber's Nick Heidfeld.
He was accused of gaining an advantage by cutting the Spa circuit's Bus Stop chicane in a late-race battle with Ferrari's Kimi Raikkonen.
McLaren said they would appeal against the stewards' decision.
The demotion meant Hamilton's lead over Massa in the title chase is cut to two points.
Massa's team-mate Raikkonen, who crashed out of second place shortly after losing the lead, is 19 points behind Hamilton.
The Mclaren driver had survived a frantic last two laps at the Spa track where he passed Ferrari's Kimi Raikkonen, lost the lead again with a spin, re-took it and then saw Raikkonen crash.
BMW Sauber's Nick Heidfeld ended up on the podium with an inspired decision to come in for wet-weather tyres at the start of the last lap.
Renault's Fernando Alonso chose the same tactic and it secured the double world champion the fourth place he had held for much of the race.
Adrian Sutil, driving for Force India-Ferrari, did best of the local drivers, finishing in 13th spot, while Jenson Button was 15th for Brackley-based Honda. Team-mate Rubens Barrichello retired after completing 19 laps.
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