Formula One boss Bernie Ecclestone suffered a head injury after muggers robbed him of jewellery in London, police said Friday, just weeks after he said only "simple" people got attacked in the city.

Robbers punched and kicked the 80-year-old billionaire to the ground after pouncing on him and his girlfriend Fabiana Flosi, 31, outside the headquarters of his business empire, Formula One Holdings, police said.