Brazil gun gang targets Jenson Button's car

Formula 1 champion Jenson Button has praised the quick actions of his police driver after armed men threatened him in Sao Paulo, Brazil.

Button called him a "legend" for fleeing through traffic after six men brandishing machine guns approached.

Button, his manager and trainer all escaped unharmed as they were driven to their hotel after practice for Sunday's Brazilian Grand Prix at Interlagos.

Brazil's major cities have a bad record for serious crimes of violence.

Damon Embling reports.