A Queensland mother has been charged with murder over the death of her two toddlers.

— With AAP.

A mother has been charged with murder over the death of her two toddlers, who were allegedly left for hours in a hot car at Logan, south of Brisbane.

Paramedics were called to a home at Waterford West in Logan at 1.35pm on Saturday after the sisters were found unresponsive in the car. The paramedics were unable to revive the one-year-old and two-year-old.

Kerri-Ann Conley, the girls’ 27-year-old mother, was charged late on Saturday night with two counts of murder, police said.

Police say it appeared the sisters had died of exposure to extreme heat, with yesterday’s temperature in the area being around 30 degrees.

The police are still trying to establish exactly how long the toddlers had been in the black station wagon parked in the front of the property.

Nine News reports the mother had rushed the toddlers’ bodies inside to try cool them down by splashing water on them.

“The two children exhibited signs of being exposed to extreme heat and that is forming the direction of our investigation,” Detective Inspector Mark White said on Saturday.

“We are speaking to the parents of those children. It’s a very tragic incident which has occurred.”

Police said they were offering support to officers who attended the scene.

“It is tragic,” Detective Inspector White said of the crime scene.

“We are putting a lot of emphasis on supporting our people. It is very very tragic and can be quite a distressing scene to be confronted by.”

“One of our priorities in addition to conducting the investigation is the wellbeing of our staff and our other emergency service colleagues.”

Kerri-Ann Conley will appear at Brisbane Magistrates Court on Monday.

People are asking for any members of the public who have information concerning the deaths to come forward.