A murder investigation has been launched after a man was stabbed to death at a party in east London.
Lamar Jackson, also known as the rapper Hypo, was found with stab injuries by police officers and paramedics after they were called to reports of a fight breaking out.
Despite efforts by emergency services, the 39-year-old was pronounced dead at the scene in Woodford.
According to reports, Mr Jackson is the ex-boyfriend of singer Emeli Sande and has previously collaborated with Jamaican DJ Popcaan.
Hypo has released several tracks over the years, including Flex On My X, First Night and No L's.
Rapper and actor Genesis Elijah paid tribute to the musician by writing a poem and tweeting: "I still got footage of me Hypes and Dappy chilling at the shop that I never put out. RIP Hypo."
His family have been informed and are being supported by specialist officers but formal identification is yet to take place, police said.
Officers believe the attack, or events leading up the stabbing, may have been filmed and have appealed for anyone with information to get in touch.
"This attack happened at a party and we know that a large number of people would have been in attendance. I would urge anyone who is yet to speak with us to come forward and let us know what you saw," Detective Chief Inspector Laurence Smith said.
"It is possible that events leading up to the stabbing, and perhaps the murder itself, were captured on people's phones. Please take a look and call us. It is vital that we establish what happened."
No arrests have been made as of yet and a crime scene remains in place around the area.
Anyone with information is asked to call police on 020 8345 3985 or 101 quoting reference CAD 66/03Jun.