Police allege a woman was approached by a man unknown to her on Carmody Place in Bunbury, approximately 175 kilometers south of Perth, around 3:50 PM on Monday, November 2.
The man, identified as a 40-year-old local resident, allegedly threw a flammable liquid over the woman before setting her alight. The victim sustained serious injuries and was transported to Fiona Stanley Hospital for medical treatment.
Bunbury detectives apprehended the suspect on Tuesday. He has been charged with one count of grievous bodily harm and remanded in custody. He is scheduled to appear in Bunbury Magistrates Court on December 3.