A young model has died after being found stabbed in a London street.
Two men were arrested after the 25-year-old was discovered fatally wounded in Old Oak Road, East Acton, at about 16:00 GMT on Thursday.
Several fashion brands and a modelling agency have named the victim as Harry Uzoka.
Friends and fans, including fellow models and a singer, have paid tribute to Mr Uzoka, describing him as an "inspiration to young black men".
Two men aged 27 and 28 were arrested near to the scene on suspicion of murder and are in custody.
Det Insp Beverley Kofi, of the Metropolitan Police, said: "This is another tragic murder with a young male victim who has met a violent death."
Police think Mr Uzoka was assaulted and stabbed at Ollgar House, in Ollgar Close, before he staggered and collapsed in Old Oak Road.
Det Insp Kofi added: "We believe there were a number of people involved, but we are still working to establish the circumstances and a possible motive."
It is the fifth murder investigation under way in London this year, four of which have been fatal stabbings.
British model and fashion designer Leomie Anderson, who had previously been in a relationship with Mr Uzoka, wrote on Instagram: "I'm not even ready for this and I still don't accept it.
"He wasn't just my ex boyfriend, he was one of my oldest and dearest friends."
"He didn't deserve this and I am heartbroken."
Fellow model Jourdan Dunn called Mr Uzoka a "young king" in her tribute on Twitter.
Singer MNEK tweeted: "I met him various times and thought he was always so cool. My heart goes out to his family. RIP."
GQ magazine said: "The staff of GQ are appalled and saddened by his death and would like his family to know that our thoughts and prayers are with him and his loved ones."
Fan Lew Bloyce, 22, has followed the young model's blossoming career.
The Selfridges employee from south-east London said: "I've known of him for many years via social media.
"I've always looked at him as an inspiration to young black men and something of an icon."
A spokesman for Premier Model Management said its thoughts were with the Uzoka family.
The agency features a portfolio of photographs of Mr Uzoka.
Online clothing retailer Everlane added: "We're deeply saddened to hear about Harry Uzoka's passing. He was a wonderful model, but even more so a good person and a pleasure to work with.
"There's so much more behind the person you've seen in our campaigns.
"Thank you, Harry, for being such a great person. Rest in peace."
Fashion brand G-Star RAW said: "Harry has worked closely with us as a model. Harry had a contagious personality - he would light up the room and make everyone on set smile.
"We will miss him."