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Lewis Hamilton has won the Austrian Grand Prix after colliding with and then overtaking team-mate Nico Rosberg on a dramatic final lap.
The thrilling manoeuvre saw the German fail to give way to his quicker Mercedes colleague at Turn 2 with the cars touching, sending Hamilton wide but causing damage to Rosberg's front wing.
Rosberg's car sparked along the track as Hamilton overtook him and both Red Bull's Max Verstappen and Ferrari's Kimi Raikkonen passed his slowing vehicle.
The championship leader eventually limped home in fourth place with television pictures showing Mercedes boss Toto Wolff visibly furious at the outcome of the incident.
Pit errors and strategy mistakes looked set to deny the world champion a crucial victory in his quest to cut Rosberg's lead at the head of the drivers' standings.
However, Hamilton's win sees the deficit to Rosberg reduced to just 11 points as he tries to secure a third straight title.
It was announced afterwards that Rosberg is also under investigation by the race stewards for failing to stop a seriously damaged car so it remains to be seen if he will hang onto all the points he earned by finishing fourth.
On the victory lap, Hamilton's engineer Peter Bonnington congratulated him but added: "That's not the result we were after."
Hamilton's reply was clear in where he saw the blame for the collision: "I was on the outside - it wasn't me who crashed."
The 31-year-old was loudly booed on the podium by the large attendant crowd when receiving his trophy and also when interviewed shortly after.
The Red Bull of Daniel Ricciardo came home in fifth place while McLaren's Jenson Button drove a brilliant race to secure sixth spot.
Romain Grosjean of Haas F1, Toro Rosso's Carlos Sainz, Valtteri Bottas' Williams and Manor's Pascal Wehrlein completed the top 10.
1 HAMILTON 1:27:38.107, 2 Verstappen +5.719, 3 Raikonnen +6.024, 4 Rosberg +16.7, 5 Ricciardo +30.9, 6 Button +37.7, 7 Grosjean +44.6, 8 Sainz +47.4, 9 Bottas +1 LAP, 10 Wehrlein +1 LAP.