15 year old killed in west London shooting named as Rene Graham
Four men are in custody on suspicion of murder
The 15-year-old boy shot dead in a park in west London on Sunday has been named.
Rene Graham was killed in Emslie Horniman's Pleasance Park in Ladbroke Grove, west London, at about 7.20pm on Sunday, the Metropolitan Police said.
Four men, two aged 21 and the others aged 20 and 25, have been arrested on suspicion of murder and are in custody, and a crime scene remains in place.
Detective Chief Superintendent Christina Jessah said: "This investigation is at an early stage and we are keeping an open mind as to the motive.
"It will take us some time to establish the facts and this will be our priority in the coming days.
"We are keen to speak to other witnesses who were in the area at the time of the shooting.
"There was an event taking place and it's possible people may have been taking photos or filming.
"Please check to see if you have captured anything that may help detectives."
Police earlier incorrectly said six people had been arrested as part of the investigation.