Eight men have been arrested on suspicion of murder following the death of a teenager in Luton.
Delaney Brown was killed when he was struck by a sliver BMW in Vincent Road on September 5.
Four men aged 20, 18, 18 and 17 were arrested on suspicion of conspiracy to murder during raids in Luton and Bedford this morning.
Four other men aged 22, 19, 18, and 17 were also arrested on suspicion of conspiracy to murder.
They were due to answer bail today and are also being questioned by detectives from the Bedfordshire, Cambridgeshire and Hertfordshire Major Crime Unit.
Officers are continuing to appeal for information relating to Delaney’s death and attempts to trace a young woman with two children who was pushing a buggy along Vincent Road at the time of the incident.
DCI Steve Collin from the Major Crime Unit said: “We are making real progress with this case but I still need people to come forward and put what they know down on paper.
"People clearly have information about who was driving the silver BMW that was used to kill Delaney, they now need to do the right thing and speak to the police.”
He added: “I would also make a direct appeal to the woman with the buggy who stopped to help. I believe she is a vital witness in this investigation and I would urge her to come forward and speak to officers as soon as possible.”
Anyone with information should call officers on 01707 355666, or Crimestoppers, anonymously, on 0800 555 111.