SHANGHAI - FORMULA One stewards are investigating Lewis Hamilton's Japanese Grand Prix victory after complaints about the championship leader's erratic driving behind the safety car last weekend.

'New evidence has emerged and the stewards are looking into it,' a spokesman for the International Automobile Federation (FIA) said.

Red Bull's Mark Webber and Toro Rosso's Sebastian Vettel collided while following the McLaren driver behind the safety car in that race and both complained that his driving was a contributory factor.

Hamilton's victory at Fuji left the 22-year-old McLaren rookie in a position to clinch the title in China. He leads double world champion team mate Fernando Alonso by 12 points with two races remaining. -- REUTERS