Harry Potter star Daniel Radcliffe rushed to the aid of tourist who was slashed in the face by muggers riding a moped.

Mr Radcliffe, 27, was in a group of people who helped the victim who was in his 50s, after he was attacked in Chelsea.

The man was in the UK for a short holiday and was targeted for his Louis Vuitton bag, which the thieves took from him.

Witness David Videcette, a former policeman who worked with the Met Police's counter-terror unit, told the Evening Standard: "They grappled with him [the victim] on the pavement.

"He wasn't going to give up the bag willingly. I tried to ram the bike with my car but I wasn't able to.