Death of Faringdon baby boy investigated as police arrest man, 21
An investigation has been launched into the the "sudden" unexplained death of a baby in Oxfordshire.
The 11-week-old boy collapsed at a Faringdon property on Sunday and was taken to Great Western Hospital.
He was transferred to Bristol Royal Hospital for Children where he died at 22:30 GMT on Tuesday.
A 21-year-old man from Faringdon arrested on suspicion of grievous bodily harm on Monday was bailed a day later until 2 February.
A post-mortem examination has yet to take place.
Det Ch Insp Kevin Brown, of the major crime unit, said: "Thames Valley Police is treating the death as suspicious at this stage and an intensive investigation has been launched.
"However, I would like to stress that this is a very complex case and we are keeping an open mind as to the cause at this moment."
He added: "The force's specially trained family liaison officers are currently with the family, at this extremely distressing time."