Detectives probing the sudden death of a baby in far north Queensland in January say a woman is assisting their investigation.

Detectives are speaking to a woman over the sudden death of a baby in far north Queensland in January.

Police said the baby died near Atherton, inland of Cairns, on January 21 but they haven’t revealed how the baby died or whether the death was considered suspicious.

“Detectives from the Mareeba Child Protection Investigation Unit have commenced Operation Mike Tamatins in relation to the ongoing investigation into the sudden death of a baby,” a police statement said.

“A woman has been assisting police with their investigations.”

Specialists from the Child Trauma Task Force and the State Crime Command are assisting local officers.

Meanwhile, investigations are continuing into the death of a three-year-old girl who died in an outback Queensland home this week.

Police say the toddler was driven from a home in Mount Isa to the mining city’s hospital, where she was declared dead on Monday night.

Detective Senior Sergeant Kelly Harvey told AAP on Friday that officers were awaiting the results of a post-mortem examination before determining whether the death was suspicious.