The boy, believed to be nearly 12 months old, was pulled from the River Irwell, just before 4.30pm. The baby was rushed to hospital but died a short time later
A 22-year-old man has been arrested on suspicion of murder.
Get Supt Jamie Daniels said it was an “incredibly tragic accident” which “has led to an innocent baby boy losing his life”.
It was not clear how the boy came to be in the water, according to officers.
Unconfirmed reports suggest that the baby was thrown from a bridge.
More to follow…