Radio host Maajid Nawaz has said he was "racially attacked" outside a London theatre.
In a series of tweets, the LBC presenter said a white male attacked him from behind outside the Soho Theatre on Monday evening.
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,” Mr Nawaz said, adding: “He was just a racist.”
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.
The suspect had fled the scene before officers arrived, no arrests have been made and an investigation has been launched.
Mr Nazaz said: "My forehead will probably be scarred for life. But we will find you, you racist coward, and you will face British justice."
In one tweet he said there were witnesses who heard the racial abuse, and they gave statements to the police - who "have his face on CCTV".
The attack prompted outrage on social media, with well-wishers condemning the attack.
Shadow Home Secretary Diane Abbott said: "Shocking. I hope you are not seriously hurt."
Columnist Rita Panahi added: "Despicable. The racist thug deserves a lengthy term behind bars. Hope you’re feeling better soon, Maajid."
Former Eastenders star Tracy Ann Oberman commented: "So sorry Maajid. Hideous. Sending love and speedy recovery."
Mr Nawaz is the founder of the Quilliam Foundation, a counter-extremism organisation.
