Police said it was a "tragic case" that such a young baby had died
Three people have been arrested in Greater Manchester on suspicion of murdering a seven-week-old baby, police have confirmed.
The boy from Clarksfield, Oldham was admitted to Royal Oldham Hospital on Sunday with severe head injuries and a police investigation was launched.
He was transferred to the Royal Manchester Children's Hospital, where he died.
Two men aged 35 and 26 and a woman aged 23 are being questioned by police.
All three are being held on suspicion of murder and conspiring to pervert the course of justice.
The woman and 35-year-old man were originally arrested on suspicion of section 18 assault.
A post-mortem examination revealed the boy died from serious head injuries.
Det Insp Andy Cunliffe said it was a "tragic case" in which a very young baby has lost his life.
"We are determined to find out exactly what the circumstances were that led to him suffering such injuries," he said.
"News of the death of such a little boy will no doubt come as a great shock to people and I would like to try and reassure the community as much as I can that we have a team of detectives dedicated to working on this investigation and they will be interviewing the three people in our custody."