A North Queensland home has been declared a crime scene after a one-year-old boy died in suspicious circumstances.
The boy was found at a Cairns house in suburban White Rock about 9am on Monday, police said.
Detectives are talking to other people who live at the property.
Police could not provide any further details.
A Queensland Ambulance spokeswoman said the boy was still alive when paramedics were called to the home about 8.40am on Monday.
He was in a critical condition as he was rushed to the Cairns hospital, but he could not be saved.