Police are offering a reward of up to £20,000 for any information leading to conviction of those responsible for the murder of a 16-year-old in Tulse Hill.

John Ogunjobi found with stab injuries on Greenleaf Close shortly before 11pm on November 5 last year. Despite the efforts of paramedics, he died at the scene.

Officers are asking anyone who may have seen a black Audi Q5 in or around the Tulse hill area at the time of the incident to come forward and speak to police.

An investigation is underway by detectives from the Homicide and Major Crime Command, led by Detective Chief Inspector Richard Vandenbergh.

Four men, all in their early 20s, have been arrested and released under investigation.

DCI Vandenbergh said: "I am appealing to anyone who has information that could assist this investigation to come forward and speak to police.

"We believe the victim was attacked by a number of suspects and the altercation would have undoubtedly been witnessed by a number of people.

“We are also asking people to think back as to whether they saw a black Audi Q5 on the evening of the murder or in the days leading up to or following it.

“I hope that the reward associated with this case will help encourage people who have information, to share what they know. We are still working to establish the circumstances around the attack but believe that several people will have key information that would enable us to get justice for John’s family.

“Moreover, I think it is quite likely that some people who were friends with John will hold vital information that they haven’t shared with police.

"They should think about his death at such a tragically young age, think about the misery caused to John’s family and maybe think about the reward too – and then make what is surely an easy decision - to come forward and speak with police.”

Anyone with information is asked to contact the incident room on 020 8721 4961 or call Crimestoppers anonymously on 0800 555 111.

You can also tweet information to @MetCC.