Five people have been arrested after a teenage boy was found dead in Heywood.
Greater Manchester Police (GMP) said 17-year-old Callum Riley was found with 'serious' injuries' on Atholl Drive in the early hours of Saturday morning (17 September).
He died a short time later.
A 25-year-old man has been arrested on suspicion of murder and a 23-year-old woman has been arrested on suspicion of assisting an offender.
They remain in police custody alongside two men, aged 18 and 33, who were also arrested on suspicion of murder yesterday.
A 21-year-old woman has been released and faces no further action.
Before the body was found, police said another man had 'asked for help from the occupants of a property a short distance away'.
Detective Chief Inspector, Gina Brennand, of GMP's Major Incident Team, said: "On behalf of GMP, I send condolences to Callum’s family.
"A specially trained officer has been deployed to liaise with them and ensure they are fully updated on our investigation.
"Since this morning, we’ve made progress in establishing the full circumstances surrounding this incident and have made a third arrest.
"However, our enquiries are very much ongoing and we are continuing to appeal for information.
"We are continually assessing the impact this incident has had on local communities but I reiterate that we do not believe there is any risk to the public.
"Officers from the Rochdale district will be providing a visible presence in the coming days for reassurance."
One shocked neighbour said: "That is so surreal, I can't believe it."
A woman, who said she knew the victim's mum, said: "That poor woman's family."
Another added: "I’ve lived here for eight years and nothing like this ever happened, this is mad."