LEWIS Hamilton is under investigation by Formula One officials over his behaviour at Sunday's Japanese Grand Prix.The world championships leader was accused by Red Bull driver Mark Webber of causing him to hit Toro Rosso's Sebastian Vettel by speeding up and slowing down behind the safety car.

LEWIS Hamilton is under investigation by Formula One officials over his behaviour at Sunday's Japanese Grand Prix.

The world championships leader was accused by Red Bull driver Mark Webber of causing him to hit Toro Rosso's Sebastian Vettel by speeding up and slowing down behind the safety car.

It is thought Hamilton has already met a three-man panel of stewards at the Chinese Grand Prix in Shanghai.

They are believed to be deliberating on what action to take over the incident.

If he found guilty of dangerous driving, Hamilton could have his points from the Japanese race wiped out.

That would be a huge blow to his hopes of becoming the first driver to win the world championship in his rookie season.

His Fuji victory gave him a 12-point lead over defending champion and team-mate Fernando Alonso.

If he does not receive a points deduction, he could seal the title on Sunday.