Hannah Baxter, 31, succumbed to her injuries at the Royal Brisbane and Women’s Hospital early this evening, Queensland Police said.
Ms Baxter was in a car with her three children Laianah, Aaliyah and Trey around 8:30am this morning when she was reportedly approached by Rowan Baxter, 42 in Raven St in Camp Hill.
Mr Baxter – with whom she owned a gym and had three children – reportedly approached the vehicle, dousing her in petrol before stabbing himself.
The two girls aged six and four along with a three-year-old boy were found dead inside the car, police said. Mr Baxter, 42, was also pronounced dead earlier today.
Hannah and Rowan Baxter were reportedly undergoing a separation, with Nine reporting Ms Baxter and her three children had been staying with her parents in Camp Hill.
Eyewitness Aaron Snell told The Courier Mail Mr Baxter was in “all manner of states’ and jumped into the flaming car to grab a knife while bystanders tried to help.
Mrs Baxter managed to get out from the car and was hosed down by neighbours who worked with fire extinguishers and a garden hose to put out the flames.
Mr Snell said the heroic acts were met with anger by Mr Baxter who was “protesting to stop putting it out.”
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Family friend Brian Cavanagh told the network the incident was “beyond comprehension”.
“I couldn’t figure out how come Hannah was in the car with him,” he said.
“On arrival, police and emergency services have identified five people that were involved in the fire inside the vehicle. I can confirm that we have three deceased children under the age of 10 in the vehicle,” Detective Inspector Mark Thompson told reporters at the scene.
“We have another deceased adult male who was known to the children, and we also have a victim suffering extensive injuries that are also known to the children and the adult male.”
If you or anyone you know needs help, contact Lifeline on 13 11 14 or Beyond Blue on 1300 224 636.
More to come.