A man who handed himself in over a Bendigo crime spree has also been spoken to about the death of an 11-month-ld baby, police say.

Three burglaries and a spate of car thefts occurred in Long Gully, sometime between the evening of Thursday June 14 and Friday June 15.

On the same night an 11-month-old boy died in suspicious circumstances, just minutes before his parents reported a burglary at their home in the Long Gully area.

Investigators say the man handed himself in to police in connection with burglaries and thefts, but has denied any involvement in the baby's death.

He currently helping police with their enquiries, and no charges have yet been laid.

Police say they still have no suspects in their murder investigation.

Detective Inspector John Potter, of Victoria Police, told a media conference today: "The incidents of burglaries and car thefts in the vicinity of the address is still being looked at.

"We don't know whether there is a connection at this stage with the death of the 11-month-old boy.

Bottom line is we don't know at this stage who is responsible for the death of the child."