Death of Police said paramedics transported the baby from a residence to Bundaberg hospital after 5pm on February 26.

The boy was airlifted to the Queensland Children’s Hospital in Brisbane in the early hours of February 27.

The four-month-old baby died at the hospital on Sunday, five days later.

Bundaberg Child Protection and Investigation Unit detectives and Crime and Intelligence Command child trauma unit specialist police are investigating.

“Investigators have launched a public appeal for information as they piece together the events leading up to the boy’s death,” a police statement said.

Anyone with information should contact police.