LBC radio presenter Maajid Nawaz has said he was racially attacked and hit in the face outside a central London theatre.
In a series of tweets, Mr Nawaz said a white man attacked him from behind outside the Soho Theatre.
He posted a photo of a cut to his forehead and said the man racially abused him and then hit him in the face with "maybe a signet ring".
The attacker then ran away "like a coward" and "He took nothing. He was just a racist," Mr Nawaz said. Mr Nawaz presents a show on LBC radio on Saturday and Sunday lunchtimes.
The Metropolitan Police said they were called to a report of a racially aggravated assault in Dean Street at 7.10pm on Monday.
In one tweet he said there were witnesses who heard the racial abuse, and they gave statements to the police - who "have his face of CCTV".
Mr Nawaz is the founder of the Quilliam Foundation, a counter-extremism organisation.
He asked not to be contacted, but thanked those who had offered their support.