The homicide squad has arrested a man and woman after a baby became unresponsive at a Victorian home and later died.

The one-year-old boy became unresponsive at a Sebastopol home in Ballarat around midday on November 4, police were told.

He was taken to hospital by his mother and her partner, but sadly died in a Melbourne hospital two days later.

Detectives yesterday arrested a 26-year-old woman and an 18-year-old man.

They were interviewed and released pending further enquiries.

Police are yet to determine the exact circumstances leading up to the boy's death.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report at www.crimestoppers.com.au .

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