Police in Perth are searching for a gang of men who set another man on fire during an argument, leaving him with burns to almost half his body and fighting for life in hospital.
The police station in Cannington, south-east of Perth, had to be closed on Sunday after the 20-year-old man from East Cannington collapsed there while seeking help.
WA police said he was shirtless when he arrived at the police station as he had taken it off as he put out the fire.
Investigators say they are searching for a gang of five men they believe are responsible for the man's injuries, which are mainly to his legs and stomach, with minor burns to his face.
The victim is in Royal Perth Hospital in a critical but stable condition.
Acting Detective Senior Sergeant Rob Jamieson told reporters authorities believed the incident happened near Mallard Road and Hamilton Street between 4am and 4.30am.
Acting Det Sen Sgt Jamieson said the victim was out walking when he was approached by five dark-skinned males.
"During an altercation some form of accelerant is believed to have been poured or sprayed onto the victim and he was set alight," he said.
At the time of the incident the victim was wearing black jeans or shorts, white sneakers and a black singlet.
One of the offenders is described as aged between 18 and 25, about 175 centimetres tall, of slim build, wearing black-and-red basketball shorts and no shirt.
Anyone with information is asked to call Crime Stoppers on 1800 333 000.