A 31-year-old mother involved in a vehicle fire at Camp Hill in Brisbane has died from her injuries, Queensland Police confirmed.

Hannah Baxter died at the Royal Brisbane and Women's Hospital early on Wednesday evening.

On Thursday morning #HannahBaxter was trending on Twitter, with people from around Australia paying tribute to the young mother.

Her husband Rowan Baxter died alongside their children Aaliyah, 6, Laianah, 4, and Trey, 3 on a quiet suburban street in Brisbane's east on Wednesday morning.

Sadly, the 31-year-old woman involved in a fatal car fire which claimed the lives of three children at Camp Hill earlier today has died from her injuries. https://t.co/EmW8AETXBB pic.twitter.com/NcWJe152Y1 — Queensland Police (@QldPolice) February 19, 2020

Police said it was too early to tell whether it was a murder-suicide or an accident, although one witness told News Corp Ms Baxter had run from the car screaming "he's poured petrol on me".

Neighbours reported hearing multiple explosions before seeing the car engulfed in flames in Raven Street at about 8.30am.