More details have emerged after two men were stabbed in a fight involving approximately 20 men in London's West End last night.
Police and London Ambulance Service crews found the two stab victims in Regent Street at 3.20am today after the brawl in nearby Kingly Street.
The men, aged 27 and 31, were taken to hospital for non life-threatening injuries. Forensics officers today scoured the scene in one of the capital's busiest shopping districts for clues.
Scotland Yard said officers were keeping an open mind about the motive and were studying CCTV.
A 27-year-old man has been arrested and is being questioned by officers.
More top news
Detectives investigating the Parsons Green terrorist attack have arrested a 17-year-old boy in Thornton Heath, south London.
A review of the law is being considered after a cyclist who crashed into and killed a mother-of-two was convicted using a Victorian law.
Speaking to ITV News Foreign Office minister Tobias Ellwood said education was the greatest weapon in the fight against extremism.