A 32-year-old woman has been charged over an alleged fire at a commercial property in Port Kennedy.
The woman is accused of lighting a fire at the business on the corner of Paxton Way and Fielden Way about 9.40pm on June 14.
Seven vehicles were destroyed in the blaze, with an estimated damage bill of $200,000.
The Warnbro woman has been charged with criminal damage by fire and is next due to appear in the Rockingham Magistrates Court on August 15.
The arrest comes two weeks after police released CCTV of the alleged arson attack along with two vehicles of interest, a white Holden Statesman and a dark coloured Honda Accord that were seen in the area at the time of the fire.
The investigation is continuing and officers urge the drivers of the vehicles, or anyone with any information or vision relating to this fire, to come forward and contact Crime Stoppers on 1800 333 000 or online via www.crimestopperswa.com.au.
Rewards of up to $25,000 are available for information that leads to the identification and conviction of an arsonist.
City of Kwinana successfully prosecutes developer for storing sand in conservation wetland
Mandurah Homelessness Awareness Day supports those in need
Secret Harbour home severely damaged by fire
Fire warning: DFES releases vision of lithium-ion battery fires in Waikiki, Ravenswood
Family, domestic assaults surge in Mandurah Police District
Local winner yet to claim $1.42M Lotto win
Man charged over alleged crime rampage across Baldivis, Kwinana, Wellard
Bus crash on Mandurah Estuary Bridge causes major traffic delays
Measles exposure locations identified in Mandurah, Rockingham