Boxing legend Mike Tyson has been thanked after coming to the rescue of an motorcyclist injured in a crash in Las Vegas.

Ryan Chesley, 29, was on Interstate 15 when a taxi cut him up and he came off his bike, his lawyer, Stephen Stubbs, said.

Mr Chesley was lying on the ground when he looked up and saw former world champion Tyson, who was yelling at people not to touch the injured man.

Mr Stubbs said Mr Chesley snapped a mobile phone picture of Tyson, who vanished from the scene "like some kind of superhero" when paramedics arrived.

Tyson's assistant Steve Lott said Tyson received a handwritten thank-you note and a fruit basket from Mr Chesley.

Mr Chesley, who broke bones and tore ligaments, has been released from hospital.