A week on from the murder of Babafemi Junaid police continue to appeal for information and witness to come forward to assist with the investigation.
Police were called after 5pm on February 7, to a car in collision with a bus in Clapham Road, near to Stockwell underground station.
Junaid died of a single stab wound to the heart, according to the post-mortem examination.
Acting Detective Inspector Reid said: "One week on from the murder we are keen to hear from anyone who may have been on the bus or seen the incident on Clapham Road.
"We believe that there were a number of young people on the bus that afternoon that took mobile phone footage of the disorder on the bus and the pavement and we urgently wish to speak to them."
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