Britain's former F1 world champion Jenson Button says Sebastian Vettel shouldn't be punished further for deliberately crashing into Lewis Hamilton in Azerbaijan.

Button says it was "silly" - but the result of emotions running high in a great race.

Azerbaijan GP was a pleasure 2watch. Why? because adrenaline & emotions were high. What Vettel did was silly but he's been punished. Move on

— Jenson Button (@JensonButton) June 29, 2017

The championship leader's under investigation by the sport's governing body and was given a 10-second penalty at the time.

Hamilton called Vettel a "disgrace" - while the German claims the Mercedes driver stopped suddenly in front of him.

"Deliberately driving into another driver and getting away pretty much scot-free as he still came fourth, I think that’s a disgrace," Hamilton said. "I think he disgraced himself today.

"Imagine all the young kids that are watching Formula 1 today and see that kind of behaviour."