Senior Sergeant Wal Brierley, of Ellenbrook police, said the boys were at Mornington Park with a group of friends when a fire started about 2.30pm on Monday last week.
“Police conducted an investigation after receiving information,” Sgt Brierley said. “That led us to the arrests of two boys.”
Sgt Brierley said one of the boys allegedly stole sparklers from a store before the incident.
“A 15-year-old boy was charged with lighting a fire and two counts of stealing,” he said.
Sgt Brierley said a 12-year-old boy was also charged with criminal damage.
He also said police were still investigating another suspicious fire in Ellenbrook earlier this month.
The blaze was reported about 4.45pm on March 3 in bushland on Charlotte’s Vista and Moulton Trail.
The recent spate of suspicious fires in the Ellenbrook area comes after it was reported WA Police ended Strike Force Vulcan a month earlier, this year to finish on February 29.
The strike force was established in 2010 to identify and monitor arsonists.
It also provides a rapid investigative response to deliberately lit fires in Perth.
Sgt Brierley said the reported early strike force finish was not the case.
“Members from Strike Force Vulcan assisted Ellenbrook officers in this (arson) investigation,” he said.
Sgt Brierley also revealed Ellenbrook Police charged a further seven local youths last week for separate incidents.
“We had reports of anti-social behaviour around the petrol station,” he said.
“After conducting inquiries we charged seven juveniles with 23 offences.
“These included stealing, disorderly conduct, possession of a smoking implement, trespass and creating a false belief.”
Anyone with information on the suspicious blaze on March 3 should contact police on 131 444.