Man released after baby death questioning

A man who was being questioned over the sudden death of a baby in Perth's southern suburbs has been released without charge.

Paramedics were called to a Canning Vale shopping centre car park on Wednesday night after a caller reported a woman was with an 11-month-old girl who required emergency first aid.

The child was taken to Armadale Hospital but died.

Neighbours reported a strong smell of gas coming from the woman's home in nearby Harrisdale.

The next day, police said they were treating the death as a suspected homicide and were questioning a man who was known to the child.

On Friday, they said he had been released without charge, but the investigation continued.

A post mortem examination will be conducted next week.