Stanley Obi, 33, died in hospital Thursday night after sustaining critical burns to 90 per cent of his body when his former partner, Sarah Mudge, allegedly doused him and his new girlfriend with petrol and set them on fire.

The critically injured man was transported to the Royal Brisbane and Women’s Hospital after the fire near Logan early on Thursday morning and died shortly after 10pm.

His girlfriend, 30, escaped the house with minor burns to her throat and was taken to the Royal Brisbane and Women’s Hospital for observation.

Mudge, 31, is believed to have perished in the fire as it engulfed the home on Bidyan Boulevard in Logan, south of Brisbane.

An autopsy will be conducted on a woman’s body found in the burnt-out house to confirm the identity.

Police said Mudge somehow gained entry to the home and petrol was thought to have been “thrown around”.

Police have since been investigating the pair’s complicated relationship, which spilled over into the court system.

“We believe the person who does not reside at that residence somehow gained entry and then once in there was able to throw petrol around,” Superintendent Mark White said on Thursday.

A domestic violence link between the man and a former partner is forming part of the investigation.

Paramedics arrived at around 3am to find five people outside the home as firefighters tried to extinguish the blaze.

“We have arrived to find that a house was pretty well engulfed in flames,” Ambulance Operations Supervisor Simon McInnes said in a statement on Thursday.

Three children – aged two, three and five – were not injured.

Paramedics took a second woman, aged 30, to hospital with suspected airway burns.

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